Primer concrete contact Knauf technical characteristics

Composition and properties of the primer

The development is a special plaster primer with an acrylic base and high adhesion.

The following components are used for its manufacture:

• powdered cellulose ether;
• vinyl acetate copolymer;
• limestone chips;
• fine-grained quartz sand;
• fungicides.

Special binder fillers make Knauf concrete contact a universal composition that increases the adhesion of building materials and ensures long-term operation of the coating.

One of the key properties of the primer is to retain the moisture of the leveling mixture, which guarantees uniform drying, and this, in turn, protects the walls from cracks. In addition, when using Knauf concrete contact, the consumption of liquid finishing materials is significantly reduced.

After applying the primer, air exchange between the living room and the street is normalized, plus the vapor permeability of wall coverings increases.

An important property for which the primer deserves special praise is its ability to prevent the development of fungus and mold on the treated surface.

Basic properties of the composition

The Knauf Betonokontakt primer strengthens substrates with poor absorption and improves the adhesion of smooth surfaces to plaster and other coatings. But these are not all the useful properties of building materials. Additional benefits are:

• clogging of small cracks and cells of porous surfaces;
• the presence of fungicidal additives;
• good vapor permeability;
• alkali resistance.

The first quality allows you to save on adhesive and plaster solutions, since they will not be “sucked up” by the wall. They will retain moisture, which will prevent rapid delamination and cracking.

Thanks to antiseptic additives, there is no need to additionally treat the wall against mold and mildew.

The Knauf Betonokontakt mixture does not interfere with the passage of air in the walls and does not provoke a “greenhouse effect”.

The only drawback of Betonokontakt is the need to wait until the layer hardens after application. Before this, you can’t not only work with this wall, but also do any repairs in the room. Otherwise, dirt and dust will stick to the wet primer, and its quality will deteriorate.

Purpose and scope of application

Let's take a closer look at what primer is needed for and where it is used:

• The primer composition plays the role of a connecting link between the base and the applied finishing material. Even very smooth and slippery surfaces treated with this primer will stick to anything because the quartz filler creates a sandpaper-like roughness that provides good grip.
• Due to the penetration of substances into the structure of the base material, “Concrete-Contact” makes its outer layer more durable.
• The composition is suitable for both porous absorbent surfaces and smooth ones that cannot absorb moisture.
• This primer is a solution to the problem of plastering monolithic concrete, on which gypsum plaster does not adhere well due to poor moisture absorption.

Important information! "Concrete Contact" has one serious "contraindication". Under no circumstances should it be used before plastering with cement mixtures. The peel strength of the film created by this primer is 0.4 MPa, while the adhesion of any cement mortar starts from 0.5 MPa. In addition, cement mixtures shrink and the applied layer of plaster becomes slightly stretched. If the solution were applied directly to the concrete, no problems would arise, but with Concrete Contact it will lag behind the wall.

Because of the name of the primer, it often seems that it is only used for treating concrete slabs. In fact, “Betonokontakt” is universal; it can be applied to almost any type of surface:

• on brick;
• dense concrete;
• foam and aerated concrete;
• plasterboard, gypsum fiber sheets, cement-bonded and tongue-and-groove boards;
• tile;
• bases leveled with cement or gypsum mixtures;
• surfaces coated with oil paint;
• tree;
• metal.

If necessary, “Concrete Contact” can even be applied to plastic and glass.

The compositions from different manufacturers have some differences, so it is advisable to read the characteristics of the primer and its scope of application on the packaging before purchasing. For example, “Betokontakt” from Knauf, according to the manufacturer, is intended for treating smooth, poorly absorbent or non-moisture-absorbing substrates, which include concrete, plastered surfaces, polystyrene foam, and gypsum tongue-and-groove slabs. Apply under gypsum plaster, suitable for interior work only.

When purchasing, it is recommended to ask the seller for a certificate of compliance with established standards.

Specifications

Concrete contact has the property of turning a smooth wall into a rough one and is classified as a primer material. Due to the presence of quartz sand in its composition, concrete contact is capable of connecting almost any materials. Technical characteristics include:

• relatively high drying speed of the material. You can continue repairs within two hours after applying the solution;
• excellent moisture resistance. The concrete contact primer can be considered a waterproofing finish, because after drying a waterproof film is formed on the surface;
• Due to protection from external damage, it can serve you for many years, which is a plus. The average lifespan is approximately sixty years.

Consumption, preparation and processing

The composition from the Knauf company has a pink tint. During the work, areas with the applied composition are visible, which ensures economical consumption of material.

Consumption depends on the type of surface being treated:

• The standard indicator is within 300 g/m2;
• Porous surfaces require an application of 300-500 g per 1 m2;
• Surfaces characterized by an average level of porosity require 200-350 g/m2;
• Smooth surfaces have a minimum material consumption of 150-250 g/m2.

After the layer of primer has dried, do not delay finishing the surface. The longer the break in work, the more dust will settle on the wall and the lower the adhesion rate will be.

Before priming, thoroughly clean the base, removing dirt, dust particles, and loose fragments.

To obtain a high-quality result, it is necessary that the moisture level of the concrete base does not exceed 3%. The optimal temperature for operation is +5-+25 degrees Celsius.

It is in this range that the temperature of the air, the treated surface and the Knauf primer should be.

The composition in the package is already ready for use. It is thoroughly mixed before use.

When applying Betokontakt by machine, it is recommended to dilute the solution. The proportion in this case is as follows: up to one liter of water is added to 20 kg of primer.

The solution is not diluted if a brush, roller or brush is used for application.

Objects that are characterized by a weak level of absorption are treated with a primer in one layer. Substrates with a high hygroscopicity index are coated in two passes.

Technical characteristics of the KNAUF-Betokontakt mixture

Due to its high environmental friendliness, the primer in question can be safely used inside residential premises. It is a ready-made dispersion solution. This allows it to be used by home craftsmen without special knowledge. Betocontact primer is used quite economically. The specific consumption of the solution for preparing the base depends on:

• method of application;
• the type of surface being processed and its structure.

When applying the composition using a mechanized method, the primer consumption per square of base varies between 270–350 g.

The main characteristics of the solution include the following indicators and features:

• complete drying time – about 240 minutes;
• absence of unpleasant and irritating odor, as well as any potentially unsafe additives;
• the primer acts as an adhesion bridge;
• packaging is carried out in containers of 20 and 5 liters;
• the primer composition can be diluted (1 to 2) with ordinary water, provided that smooth surfaces are treated by painting or spraying;
• shelf life of the solution is 1 year;
• high fire safety.

Why do you need concrete contact and is it possible to do without it?

Among all the materials that are used to prepare surfaces for plastering or gluing tiles, concrete contact occupies a special place due to its versatility and unique adhesion - the ability to adhere to a wide variety of surfaces. With the help of this innovative primer, it is possible to carry out such complex connections of completely different materials as wood-glass, metal-tile and many others. Is it possible to apply concrete contact on a damp surface?

When processing dense, non-moisture-absorbing substrates, it simply has no equal. Previously, a special bandage made of fabric mesh had to be glued to a smooth concrete wall to hold the plaster. Now it is enough to treat it with concrete contact, and the surface becomes uniformly rough, capable of firmly holding not only plaster and tile adhesive, but also any other finishing materials. Even environmentally friendly, creating a particularly comfortable microclimate in any room, but very capricious gypsum plaster, will be securely fixed for many years.

What does concrete contact look like?

Everything that is treated with concrete contact not only connects well, but also acquires special strength - the plaster fastened with it never cracks or crumbles when the hammer is used. You can safely drill holes - they will be very neat, not a single extra piece will fall off.

Is it possible to apply concrete contact over water-based paint?

In addition to strength, surfaces treated with concrete contact acquire high water resistance, thanks to which they can function in conditions of high humidity. Also, a water-resistant uniform primer reduces the consumption of finishing materials applied on top.

Basic composition of concrete contact:

• Acrylic dispersion, which is the basic component that organizes the adhesion of surfaces.
• Quartz sand, which provides surface roughness (coarse-grained - for plaster or fine-grained - for putty).
• Cement.
• Compositions of chemical modifiers responsible for vapor permeability, hygroscopicity, resistance to mechanical and biological influences.

As you can see, concrete contact can be classified as an environmentally friendly, harmless material. Surfaces treated with it do not lose the ability to “breathe”. Bactericidal components prevent the appearance of mold, fungi and insects. The activity indicator of hydrogen ions in concrete contact solutions corresponds to neutral acidity, which indicates that they do not pose a corrosive hazard to metals and do not react with lime-containing solutions. Sometimes coloring pigments are added to the components to make it easy to determine where the application was and where it was not.

Wall application

The full properties of each concrete contact, as well as the conditions and shelf life, must be described in the documentation attached to it, in support of which a certificate of compliance with the quality established by GOST standards is attached or presented upon request.

Is it possible to apply concrete contact to gypsum plaster?

Attention! It is prohibited to use concrete contact that has expired its shelf life, as well as one whose structure has become heterogeneous and lumpy.

In practice, when determining which concrete contact is best to use, they rely on such technical characteristics as:

• fast drying time of the treated surface;
• degree of moisture resistance;
• duration of service life;
• cost standards.

If you need a complete description of concrete contact, it can always be found in the instructions

Working with concrete contact primers is very easy, you just need to follow some simple rules:

1. The surfaces to be coated do not require special treatment, but dirt, grease, swelling and falling off pieces of old coatings must first be removed.
2. Work must be carried out in the temperature range from +5 to +30. But for high-quality operation, the temperature can be from -40 to +60.
3. Typically, the conditions for maintaining concrete contact require positive temperatures. However, now you can also find a frost-resistant solution that allows storage and transportation at -15 degrees, as well as a 5-fold freeze-thaw cycle.
4. It is better to apply finishing materials on top of the concrete contact layer immediately after drying, before it becomes dusty (dust reduces adhesion). A delay of more than two days is already critical - a fresh coating needs to be applied.

View of freshly applied concrete contact

How and with what is drywall primed for different finishes?

There are several other points that may affect the choice of soil. First you need to decide on the properties of the material. They are as follows: The primer must be applied twice at intervals so that the first layer dries out. Usually wait from 12 to 24 hours. Although many manufacturers claim that 6 hours should be enough.

But it’s better not to rush, because humidity and temperature are different everywhere. The weight of ceramic tiles is quite large, so you need to make sure that they are held firmly. Tile adhesive helps with this, but you can’t do without primer. It’s not difficult to guess how to prime drywall before laying tiles.

It is worth choosing the same deep penetration acrylic primer with antifungal properties. When choosing specific products from different manufacturers, you need to make sure that they are suitable for working with ceramic tiles

It is worth paying attention to the primer consumption for drywall per 1m2. This indicator is always indicated by the manufacturer on the packaging

You should always add about 10% to it to get a real result.

It should also be taken into account that the consumption is indicated for one layer, but you will need to apply the primer in two layers (the second is applied after the first has completely dried). Consumption usually ranges from 100-150 grams per square meter. When the question arises of what primer to use on drywall, you need to decide what types of this material exist.

It is important to choose a material based on the manufacturer, but still, you need to know about its existing varieties. The main types are as follows:

Additional information on the topic:

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• How to hide a beam on the ceiling in a wooden house with plasterboard
• How to install a plasterboard arch on a video profile
• Is it necessary to putty drywall before gluing liquid wallpaper?
• How to glue ceramic tiles to drywall other than tile adhesive

Soil characteristics

Knauf primer is available in two types: one modification contains mineral particles measuring 0.3 mm, and the other - 0.6 mm. The first is used for delicate work and before puttying, and the second is more suitable for rough finishing. The dye included in the composition helps not to miss a single area during processing.

According to GOST, the technical characteristics of the Knauf concrete contact primer are as follows:

1. Neutral acidity index Ph 6.5−7.5.
2. Short drying period. It depends on the humidity and temperature in the room, but usually no more than 10-12 hours.
3. Long service life. The manufacturer claims that the primer applied to the walls can last more than 50 years.
4. A wide range of temperatures (from -20 to +60 degrees) at which concrete contact does not lose its properties.
5. Uniform application. The mixture fits perfectly on walls both when applied manually and when sprayed with a spray bottle.
6. Highly environmentally friendly. The adhesive primer can be safely used in rooms with insufficient ventilation, since the chemical formula of the substance does not contain toxic compounds that can harm health.

The amount of primer used depends on the ability of the surface to be treated to absorb liquid. The type of building material and the number of layers of mortar also influence the consumption. So, if it is distributed over a smooth surface, for example, on tiles, then a minimum volume of dispersed substance will be required. As practice shows, to prime approximately 50 square meters, one standard package weighing 20 kg is enough.

The excellent characteristics of the Knauf-betokontakt primer have allowed it to firmly occupy a leading position in the finishing materials market.

General information about Knauf Betokontakt soil

Knauf Betokontakt primer is a mixture of pink tint, completely ready for use. Available in 5 kg containers and 20 kg buckets. The shelf life is 18 months from the date of manufacture, the opened product is stored for about 6 months in a tightly closed container .

The product has pronounced adhesive properties and is used on complex surfaces - poorly absorbent, smooth, dense . It is used to strengthen concrete bases, plasterboard slabs, when preparing metal structures for further work (putty), during laying ceramic tiles, and fastening stucco parts made of polystyrene, gypsum, polyurethane. Concrete contact simplifies construction work and reduces the amount of additional consumables due to its strengthening properties. Knauf Betokontakt primer levels surfaces, eliminates minor base defects and microcracks .

Working with Knauf Betokontakt brand soil requires compliance with a certain temperature regime. It cannot be used at temperatures of –5 degrees Celsius and below, in the cold, or when the thermometer reading is above +26-27 degrees Celsius.

The coating is applied in two layers, each drying time is about three hours, but experts recommend continuing work after 12-20 hours. You can check that it has dried by touching it with your hand; the base should not be sticky.

Knauf Betokontakt primer comes in two types - with mineral particles measuring 0.6 mm and 0.3 mm. The first type is used in rough finishing and coating of external surfaces, the second is used for more delicate work and before puttying.

When calculating the consumption of the necessary material, it is worth considering several factors:

• degree of moisture absorption of the base;
• surface type;
• number of layers;
• method of application.

With a smooth surface, such as paint and ceramic, primer consumption will be significantly lower than when applied to a concrete slab. The minimum consumption is approximately 200 g. per 1 m², maximum – 350 g.

Manufacturers produce the mixture in a state completely ready for use . Experts allow the Knauf Betokontakt primer to be diluted with a small amount of water for better mechanical application.

When applied manually, the maximum amount of water for dilution is 50 ml per liter of primer . When using the mechanical spraying method, a dilution of 2: 1 is used - two parts soil and one part water.

Another option for diluting the soil is also offered; with this technology, material consumption is reduced, but the quality remains at the same level. The coating is applied in 2 layers. The first layer consists of a mixture of concrete contact and deep penetration primer. The second is Knauf Betokontakt in its pure form.

Before starting work, the mixture must be thoroughly stirred so that all microparticles are distributed evenly over the entire area. When treating the surface, you can use any tools - brush, roller, mechanical sprayer . The pink color will help you see blurred areas.

Concrete contact - characteristics of different brands of primer

The components of concrete contact are Portland cement, sand, acrylic. This composition ensures good adhesion to any surface, from traditional concrete to plastic or glass.

Knauf concrete contact primer technical characteristics:

Universal primer Betokontakt brand VD-AK-014

1. Quick drying: after 2-2.5 hours you can continue working with the surface;
2. The high coefficient of moisture resistance allows the composition to be applied under a concrete screed;
3. The service life of the substance is 80 years or more;
4. Shades of different colors help visually determine the uniformity of the layer applied to the walls.

Area of ​​use

Primers are used to improve adhesion properties, as well as to improve the strength of the base, which is processed using the material. For each type of soil there is an instruction that specifies the composition, material consumption per m2, as well as for what work, external or internal, it can be used.

Concrete contact primer is used for the following purposes:

1. The properties of the primer make it possible to use it before screeding or self-leveling floors, which is why it is often called a primer for concrete floors
2. Primer for concrete is used to treat surfaces before finishing with plaster or putty.
3. To reduce the porosity of plasterboard slabs before gluing trellises or laying tiles
4. The composition allows you to use betokontakt before whitewashing the ceiling

The technical characteristics of the concrete primer can be used for work with non-absorbent surfaces. These can be bases coated with varnish or paint, or tiled. The most important thing is that for this there is no need to dismantle the old coating, because a penetrating primer is applied over these materials, forming a rough surface that adheres well to the new finishing elements. It is worth clarifying that the concrete contact primer has an environmentally friendly composition, and this allows it to be used in any room. Although GOST specifies what composition the primer should have, many manufacturers may deviate slightly from the list of elements, although this does not in any way affect the quality of the material.

Let's look at the technical characteristics and properties of the primer:

Manufacturers of concrete contact

There are both Russian and foreign companies on the domestic construction market that offer primers with different properties and characteristics. Price comparison will not be correct, since the functionality of each brand is different. One thing is certain: Russian manufacturers produce products that are often superior in quality to their foreign counterparts:

1. Knauf concrete contact solution: the main composition is purified quartz sand to form a rough surface. Purpose – covering a concrete monolith;
2. Concrete contact composition of the Serezit brand: intended only for indoor use, therefore absolutely environmentally friendly. The density of the multicomponent substance is 1.7 kg/m3, which means that the quality of the treated surface will be the highest. With a reasonable estimate, Serezit can also be used for exterior work;
3. Concrete contact of the “Starateli” brand is suitable for surfaces made of various building materials - concrete, gas, foam, cinder blocks, wood and plastic, glass and brick;
4. Bolars concrete contact soil is designed for any work inside or outside, made on the basis of acrylic;

The basis of any concrete contact primer composition is pure fine-grained quartz sand, which creates a rough, well-adhesive surface that ensures maximum adhesion to other materials, mainly for decorative purposes. For example, some Russian and foreign manufacturing companies introduce needle quartz into solutions, and any primer with this component will be a 100% quality guarantee.

Reliable manufacturers of concrete contacts

There are companies on the building materials market that have long established themselves. The primers from these manufacturers differ in composition, purpose and price. The cost is quite affordable: for 5 kg you will have to pay only 300-600 rubles.

Axton

This company produces a wide range of mixtures. The first representative is a high quality dry primer. It is used to treat any surfaces. Before use, add the required amount of water to the concrete contact and stir. The advantage of this material is its high drying speed: at room temperature, the composition sets in 2 hours. A small consumption is declared (300 g per 1 m2), but in reality it turns out to be more.

Ceresit

This water-dispersion primer differs from others in that it is best to apply it with a brush; using a roller is not recommended. It covers smooth surfaces; this concrete contact contains fine-grained quartz sand. The primer must not be diluted with water: high humidity and liquid that gets on the treated base will lead to a loss of properties of the material. It is used only for indoor work.

Knauf

The most famous brand in the domestic construction market. The main components of this material also include fine sand fractions. It is generally accepted that this primer has the best characteristics among other competitors. They make it possible to obtain ideal adhesion to glossy surfaces, such as glass. The first layer under normal conditions dries in an hour; final hardening takes approximately 4 hours. Consumption - about 350 g per 1 m2.

Prospectors

This primer is a domestic manufacturer, but the place of “birth” does not detract from its advantages. The primer mixture is made on the basis of latex. Concrete contact is used for surfaces that do not absorb moisture well - concrete tiles. Due to its low price and low consumption (200 g/m2), the composition is often used when installing self-leveling floors. The product does not require thorough stirring: the contents of the jar are simply shaken.

Optimist

Almost the only company that produces not only a decent primer for treating indoor surfaces, but also high-quality concrete contact intended for outdoor use. These compositions are ideal for preparing bases before applying gypsum, polymer material, and before facing with cement slabs. The minimum drying time for the primer is 3 hours, the maximum is 4. Material consumption is 300 g/m2.

Information about concrete contact: consumption, features of surface preparation and its application - the topic is necessary, but not complicated. Those who have become closely acquainted with the universal material have already become convinced of this. For example, the master from this video:

Primer concrete contact, application

Repairing a house or apartment is not only construction work or replacing failed structures and parts: often repairs involve the use of materials that have unique characteristics, one of which is primer. The material is intended to be applied to any building surface, both indoors and outdoors, and the application of concrete contact is carried out with conventional tools - brushes, rollers or a spray gun. The innovative concrete contact primer is considered a universal composition, therefore it is used as a substitute for almost all previously known priming liquids.

Surface preparation before application

Application of Knauf Betokontakt primer does not require professional training, which allows it to be used at home. Surface treatment is allowed in two ways: classical, carried out using brushes, rollers or a spatula, and mechanized.

First you need to thoroughly clean the base from dust, dirt, and foreign small particles. At the same time, it is not necessary to remove the old coating if it is well preserved and does not crack or crumble. Then the surface is degreased and inspected. Deep cracks and gaps are pre-cemented and left for 24 hours until completely dry. After this, the surfaces are primed. It is worth noting that the soil penetrates several centimeters into the layers of the concrete base, strengthening it.

Buyers speak positively about the Knauf Betokontakt soil mixture, highly appreciating its quality, convenience and ease of application, economy and quick drying.

Knauf is a time-tested brand. This modern primer composition for construction work is popular among many specialists. Knauf Betokontakt guarantees quality and durability, it saves you money and time.

The following video describes the types of primers and the intricacies of priming various surfaces in more detail.

Advantages

The technical characteristics of the Betonokontakt primer indicate a lot of advantages of this product. The composition can be used on almost any basis. It is even applied to old cladding.

"Betonkontakt" can be used before applying putty or plaster. The film formed by the composition does not allow moisture and steam to pass through. This provides reliable surface protection. It becomes stronger and does not collapse for a long time.

Primer treatment is simple. The quick drying of the layer allows you to quickly continue subsequent repair work. After treatment, mold and mildew do not appear on the surface.

"Betonkontakt" is an environmentally friendly material. It can be used indoors in any room, even in the bedroom and children's room.

Peculiarities

Often the adhesion of two different types of materials during finishing is quite problematic. Thanks to the soil, for example, betokontakt, the adhesion rate increases significantly even when the surface practically does not absorb moisture. The primer consists of cement, sand, and other special additives that create a rough layer formed by the sand, and the cement allows the mixture to adhere well to the walls.

Betokontakt Knauf primer is made only from safe, environmentally friendly components that do not emit unpleasant odors, do not harm human health and do not spoil the appearance of surfaces.

Advantages and disadvantages

Like any building material, contact group concrete primers have their strengths and weaknesses.

• improve adhesion to complex surfaces: concrete, glass, metal, tiles;
• dry quickly;
• have a long service life;
• show resistance to aggressive environments of plaster solutions;
• have waterproofing properties;
• do not serve as a base for the proliferation of fungus and mold;
• vapor permeable;
• tinted for visual control of the quality of application;
• can be used indoors and outdoors;
• have a wide range of operating temperatures - from -40oC to +60oC;
• moisture resistant;
• environmentally friendly.

• high price;
• harsh storage conditions - at temperatures below +5oC and above +70oC they lose their properties;
• increased surface requirements compared to deep penetration primers;
• fear of high temperatures during operation - at +70oC polymer fillers turn into a viscous state.

Preparing the foundation for work

Before treating concrete contact knauf betokontakt with soil, the working surface area should be prepared for subsequent work: remove dust and dirt from the base with a construction vacuum cleaner, get rid of old crumbling elements, paint and varnish products, as well as all kinds of grease, bitumen stains and materials that could contribute to the deterioration of the adhesion of the applied solution with the surface. Before applying the primer to the base, it is recommended to disconnect all electrical wiring in order to avoid a possible short circuit.

Technical parameters of Knauf concrete contact

The primer is packaged in plastic buckets of 5 and 20 kg. The solution has a pinkish tint - the pigment helps to apply it evenly. Versatility and ease of application are possible thanks to the main characteristics of the Knauf mixture:

Application and characteristics of Knauf concrete contact

• neutral acid balance (7.5–8.5);
• drying time after each application – from three hours (depending on temperature and humidity);
• the service life promised by the manufacturer is up to 80 years;
• temperature range - from 40 degrees below zero to 60 degrees.

The Concrete Contact layer can withstand at least five times of freezing/defrosting. It can be applied not only in warm interior rooms, but also outside. During priming, it is better if the temperature is kept between 5 and 25 degrees Celsius. The primer can only be stored at positive temperatures.

Due to its environmental friendliness, a similar composition is used in bedrooms and children's rooms. During work, there is no need to wear a mask or arrange forced ventilation of the room.

Manufacturers

Each manufacturer provides its products with certain technical characteristics. “Betonokontakt” “Ceresit ST 19”, “Knauf”, “Starateli” differ in a number of indicators. These are the most popular primers in our country.

The product contains quartz sand. It is sold in 5 kg containers. The presented primer is used to treat concrete surfaces indoors and outdoors. The cost of the presented “Betonkontakt” is 600-800 rubles.

also produces the presented type of primer. It is sold in a 15 kg container. The price of this product is about 1200 rubles. The presented composition is practically not inferior in quality to the previous variety of “Betonkontakt”.

One of the best domestically produced compositions is the “Prospectors” primer. It is sold in 20 kg packaging. The cost of the presented product is about 1400 rubles. The quality of this primer is not inferior to foreign analogues.

Areas of use

The main function of the Knauf primer mixture is to improve the adhesive properties of high-density surfaces on which leveling and adhesive solutions do not adhere well. The primer itself adheres to almost any base, be it a glossy tile or a concrete monolith, forming a continuous film of dark pink color on it.

Reliable connection with subsequent layers is ensured by the use of fine-grained alkali-resistant sand in its composition, which gives the base the necessary roughness. After treating the walls with Knauf concrete contact, a layer of lime or gypsum plaster can be applied to the cement without fear that dissimilar materials will enter into a chemical reaction.

This primer will be very useful for solving the following problems:

• strengthening structures that have a loose structure before plastering;
• laying new tiles without dismantling the old ones;
• ensuring reliable adhesion of decorative stucco molding to a smooth surface;
• preparation of embedded elements of reinforced concrete products and metal structures for putty;
• strengthening crumbling concrete walls before the final stage of finishing.

Thanks to the Knauf concrete contact primer, it is much easier to carry out work related to preparing the surface and removing the old stable coating.

Where previously it was impossible to do without the use of several special mixtures or reinforcing fiberglass mesh at once, a universal adhesive composition of the Knauf brand is sufficient.

Where is it used?

Primer composition Betonkontakt Knauf is an acrylic dispersion mixture. The main purpose is to cover low-absorbent surfaces with a high density so that adhesion becomes possible.

The primer adheres easily to the base, forming a dark pink film.

Adhesion to the subsequent layer is achieved by fine-grained sand, which is resistant to alkaline environments and gives the coating the desired roughness.

It should be added that this primer allows you to apply a lime or gypsum-based plaster mixture to the cement layer.

There are many other works in which Betonkontakt Knauf soil is used:

• low-density surfaces are strengthened before applying plaster layers to them;
• new tiles are laid without dismantling the old tile covering;

• treatment of surfaces coated with oil or alkyd material before finishing;
• using the Betonokontakt Knauf primer, stucco molding is securely attached to any smooth base;
• preparation of metal structures and reinforced concrete products for subsequent puttying is carried out;
• Before finishing, the dusty concrete base is strengthened.

The primer composition turned out to be multifunctional. With its help, many types of work related to the preparation of the foundation were facilitated.

What is concrete contact from Knauf?

Betonokontakt Knauf is a high-quality composition that can be used to level, strengthen and protect a concrete base. The composition does not contain any components hazardous to health, so the material can be used for interior work without any problems.

Application

The mixture must be shaken well before use. This type of primer can be used to:

• The paint on dry plaster did not begin to deteriorate over time.
• Plastering was easier and faster.
• Increase the adhesion rate of the base and finishing materials.
• Repair existing cracks or seal seams.
• Do not allow finishing materials to crack or crumble.
• Protect from the negative effects of moisture.

Knauf primer contains acrylic, which makes it more resistant to moisture. At the same time, it is possible to achieve excellent quality of preparation of the concrete base. On sale you can find a universal mixture that is perfect for both external and internal work. The manufacturer also offers contact concrete with coarse and fine fractions. The material can be used to process not only concrete, but also polystyrene foam, tiles or drywall.

Concrete contact has antiseptic properties, so the risk of mold or mildew in the future is minimal. Additionally, using a primer, you can reduce the amount of finishing materials needed, because they will not be absorbed into the base so much. The mixture allows you to increase the permeability rate, so air circulation in the room will noticeably improve.

This material is able to retain its positive characteristics even at very low or very high temperatures. Also, the properties will be preserved for one and a half years in a hermetically sealed container.

Advantages and disadvantages

Concrete contact Knauf has a huge number of advantages, the main of which include the following:

• Can be used both indoors and outdoors.
• It goes well with materials that do not absorb moisture.
• There is no need to remove the old coating before applying the primer.
• There is no need to additionally use reinforcing mesh.
• It can penetrate into the treated base to a depth of about 10 centimeters.
• The plastered areas will be so strong that after the primer has completely dried, they can be drilled without any problems.
• Retains positive characteristics for 80 years.
• The applied layer of primer dries very quickly.
• It is not afraid of moisture and allows steam to pass through well.
• Protects the base from the appearance of fungus or mold.

The mixture can be used immediately after purchase. It is enough just to mix it well. After just a few hours, the treated area will appear dry, but it is best to wait about 7 hours for the primer to dry completely.

Despite so many advantages, Knauf material also has some disadvantages. These include the following:

• At air temperatures below 40 degrees it loses its properties.
• If the primer is applied incorrectly, it will not bring a positive result.
• Dust must not fall on the surface treated with concrete contact.

Concrete contact can be used to treat surfaces only after all “dusty” work has been completed. Finishing work can be done immediately after the primer has dried, so that it does not have time to become covered with dust and does not dry out.

Application methods

Knauf primer can be applied with a roller, brush or spray.

The first option is the most economical, but takes a lot of time. If you need to treat a fairly large area, it is better to use a spray gun, but it is worth remembering that in this case the material consumption will be slightly higher.

Consumption rates for different surfaces

The consumption of primer is influenced not by the origin of the material itself, but by how much moisture it can absorb. Depending on this criterion, the bases can be divided into several main groups.

1. Porous surfaces. They absorb moisture very well and have a complex structure with a huge number of pores. In order to obtain a high-quality result, it is necessary to use special deep penetration impregnations first. Such surfaces include sand concrete, brick, and concrete. In this case, the primer consumption, provided that it is applied correctly, will be 0.3-0.5 kg per square meter of surface.
2. Medium porous surfaces. Moisture is absorbed quite slowly and in small quantities. Surfaces include concrete tiles, cement floors, cast-in-place concrete and brick cladding. Material consumption will vary between 0.25-0.35 kg per square meter of base.
3. Low porosity surfaces. They do not have pores, so they do not absorb moisture. These materials include ceramic tiles, a painted wall, and troweled concrete. The consumption of Knauf primer will be 0.15-0.25 kg per square meter.

These figures are approximate. You can determine the amount of material yourself. To do this, a square meter is marked on the working surface and concrete contact is applied to it. The material is pre-weighed. Then, after treating the base, the residues are weighed. The difference will be the primer consumption per square meter in each individual case.

Is it possible to reduce primer consumption?

In order to make construction work cheaper, they often try to save on primer. You should not do this, because the end result will be a repair that is not of sufficient quality and over time, various types of defects may appear on the surface. If you use less Knauf concrete contact than required, this will lead to poor adhesion and the base will not be strong and reliable enough. In addition, over time, fungus or mold may begin to develop if the humidity level in the room is high enough.

The concrete contact primer from the Knauf company will improve the characteristics of the treated surface and will have a positive effect not only on the quality, but also on the service life of the repairs performed. Therefore, you should not skip this stage, because it plays a very important role.

Consumption of concrete contact: how much per 1 m2?

For most people, the word “repair” is unlikely to evoke at least some positive emotions. Usually this process is associated with huge expenses: effort, money and time.

One of those tasks that sometimes causes agony even for people with repair experience, even if not professionals, is the need to increase the adhesion of certain materials. This is where the concrete contact primer comes in handy.

Concrete contact is a special type of primer that can transform absolutely any surface from perfectly smooth to as rough as necessary.

It consists of very strong glue, as well as acrylic and quartz sand. Concrete contact is used for external and internal work. The main manufacturers of this material include Knauf, Prospectors, and Master.

Advantages:

1. The main positive side of using this primer is that before applying it, you do not have to remove old coatings from the place where you want to apply it.
2. You don’t have to use reinforcing mesh during plastering work, and using concrete contact on the plaster will increase its strength, since the solution penetrates into the plaster coating and holds it together. This means that after using concrete contact you will be able, for example, to drill or perform other similar work without fear of significant damage to the finish.
3. When working with this substance, you do not need to use special protective equipment, because it is an environmentally friendly substance that does not contain any solvents or other harmful substances that can harm your health.
4. Walls treated with concrete contact will not stop “breathing”, and mold and other types of fungi will never appear on them.

Perhaps you will find useful information on how to prime walls for wallpaper. Read this article.

Flaws:

1. You cannot store this material in the cold because it will lose its properties.
2. If applied incorrectly, it will not perform its basic properties.

to contents

Consumption rates

Despite the fact that the name of this material contains the word “concrete,” concrete contact can be used on completely different surfaces.

Accordingly, the rate of its consumption will be completely different. It depends, first of all, on the porosity of the surface on which you apply it.

And although the simplest and most reliable way to determine the rate of consumption of concrete contact is to simply apply it to a part of the desired surface with an area of ​​\u200b\u200bone square meter, let's still consider the approximate rate of consumption of this material.

1. On highly porous surfaces, such as concrete slabs, bricks or special porous stones, you should apply 0.5 kg per 1 m2.
2. For materials with medium density, such as concrete monolith or concrete tiles, you will need 0.3 kg per 1 m2.
3. Low-porous surfaces (ceramics, tiles) will require at least 0.15 kg of concrete contact per 1 m2.

to contents

DIY primer application

First you need to clean the surface of debris and dirt, dust and everything else. Next you will need a roller or brush.

It is necessary to carefully place the concrete contact in the container and use a roller to apply it in an even thin layer on the wall. Corners and hard-to-reach places are treated with primer using a brush.

When performing work, you need to monitor the temperature in the room. It should not be below +5 °C.

Now the main job is done and you can rest a little. You must wait until the concrete contact is completely dry

This is very important because if it is even a little wet, it will significantly reduce the quality of adhesion

Complete drying of the concrete contact usually occurs after 5-6 hours. After this time, you can begin further finishing.

You cannot delay the continuation of finishing work, because after more than two days the surface will dry out and become dirty.

Now that you have learned about this wonderful type of primer, your renovation will be easy and enjoyable.

Video review of concrete contact primer.

Primer consumption concrete contact

Consumption directly depends on the type of surface. If the wall absorbs moisture well, then the consumption per 1 m2 will increase significantly. Concrete contact can be used for finishing brick, tiles, drywall and other coatings. To roughly calculate the mixture consumption, you will need to divide the surfaces into three groups: highly porous, with average porosity and without pores.

So brick and concrete belong to the porous group. The primer consumption for such a wall is on average 0.4 kg per 1m2. For finishing with an average porosity, which includes building tiles or monolithic concrete, an average of 0.2 kg of solution per 1 m2 will be required. Finally, non-porous surfaces will require the least mixture. The consumption will be approximately 0.15 kg for 1m2. As you can see, you don’t need a lot of mixture, so it’s quite an economical option.

Thanks to these characteristics, concrete contact has gained wide popularity among both professionals and beginners in the construction business. To learn more about this solution, let's look at a specific brand, Knauf primer.

Consumption of concrete contact: how much per 1 m2?

For most people, the word “repair” is unlikely to evoke at least some positive emotions. Usually this process is associated with huge expenses: effort, money and time.

One of those tasks that sometimes causes agony even for people with repair experience, even if not professionals, is the need to increase the adhesion of certain materials. This is where the concrete contact primer comes in handy.

What is concrete contact?

If you are not an experienced builder, then this is probably the first time you have heard this word, so we should figure out what this substance is.

Concrete contact is a special type of primer that can transform absolutely any surface from perfectly smooth to as rough as necessary.

It consists of very strong glue, as well as acrylic and quartz sand. Concrete contact is used for external and internal work. The main manufacturers of this material include Knauf, Prospectors, and Master.

Advantages and disadvantages

This type of primer, like any material, has its pros and cons. Let's look at them in more detail.

1. The main positive side of using this primer is that before applying it, you do not have to remove old coatings from the place where you want to apply it.
2. You don’t have to use reinforcing mesh during plastering work, and using concrete contact on the plaster will increase its strength, since the solution penetrates into the plaster coating and holds it together. This means that after using concrete contact you will be able, for example, to drill or perform other similar work without fear of significant damage to the finish.
3. When working with this substance, you do not need to use special protective equipment, because it is an environmentally friendly substance that does not contain any solvents or other harmful substances that can harm your health.
4. Walls treated with concrete contact will not stop “breathing”, and mold and other types of fungi will never appear on them.

Perhaps you will find useful information on how to prime walls for wallpaper. Read this article.

1. You cannot store this material in the cold because it will lose its properties.
2. If applied incorrectly, it will not perform its basic properties.

Consumption rates

Despite the fact that the name of this material contains the word “concrete,” concrete contact can be used on completely different surfaces.

Accordingly, the rate of its consumption will be completely different. It depends, first of all, on the porosity of the surface on which you apply it.

And although the simplest and most reliable way to determine the rate of consumption of concrete contact is to simply apply it to a part of the desired surface with an area of ​​\u200b\u200bone square meter, let's still consider the approximate rate of consumption of this material.

1. On highly porous surfaces, such as concrete slabs, bricks or special porous stones, you should apply 0.5 kg per 1 m2.
2. For materials with medium density, such as concrete monolith or concrete tiles, you will need 0.3 kg per 1 m2.
3. Low-porous surfaces (ceramics, tiles) will require at least 0.15 kg of concrete contact per 1 m2.

DIY primer application

First you need to clean the surface of debris and dirt, dust and everything else. Next you will need a roller or brush.

It is necessary to carefully place the concrete contact in the container and use a roller to apply it in an even thin layer on the wall. Corners and hard-to-reach places are treated with primer using a brush.

When performing work, you need to monitor the temperature in the room. It should not be below +5 °C.

Now the main job is done and you can rest a little. You must wait until the concrete contact is completely dry

Complete drying of the concrete contact usually occurs after 5-6 hours. After this time, you can begin further finishing.

You cannot delay the continuation of finishing work, because after more than two days the surface will dry out and become dirty.

Now that you have learned about this wonderful type of primer, your renovation will be easy and enjoyable.

Video review of concrete contact primer.

Concrete contact

The components that make up the concrete contact deep penetration primer (acrylic compounds, cement and sand) make it possible to easily create excellent adhesion on the surface due to the roughness of the structure, similar in appearance and properties to sandpaper.

Using concrete contact primer for walls when carrying out finishing activities, you can combine almost different materials, which makes it possible to create a unique, original design on walls and ceilings. Moreover, according to experts, the material adheres firmly to surfaces for quite a long time. Acrylic Betocontact primer can be applied to almost any surface: concrete pavement, tiles, metal surfaces, wood, brickwork, painted surfaces, etc.

Primer manufacturers

In our company you can get free advice on the choice of finishing materials and buy concrete contact primer in Moscow from both domestic and foreign manufacturers of the following brands:

• Finishing mixture – Knauf concrete contact primer. Its components include quartz sand, which forms roughness on the surface when processing concrete and other coatings. The consumption of concrete contact primer per 1 m2 is no more than 240-340 g/m2.
• The primer composition concrete contact ceresite has a density of 1.8 kg/m3 and environmentally friendly properties, used for interior decoration. How much does concrete contact cost? The cost of concrete contact primer is significantly lower than that of Knauf.
• The prospector primer mixture is used in addition to concrete surfaces, also for application with a roller or brush on gas silicate blocks, without additional processing.
• Acrylic primer liquid Acrylic primer. This material can be used to process both external and internal surfaces; when using it, you can lay a new layer of ceramic tiles directly on top of the old one. This brand of concrete contact primer has a consumption of 290-310 g/m2.

The basis of any composition of these materials is quartz sand, which differs in structure from different manufacturers; some add needle quartz to increase adhesion.

Primer technical specifications

The use of such a material makes it possible to create roughness on almost different smooth surfaces to increase adhesion. The main advantages of the soil include:

Concrete contact application

• Accelerated drying process for coated surfaces. After 2-3 hours have passed after coating with the primer mixture, you can safely begin the next work process.
• Increased moisture resistance. After applying the primer, a film is formed on the treated areas that does not allow moisture to pass through; thanks to these properties, the composition can be used for waterproofing when making cement screed for the floor.
• The material has a long service life; the manufacturer guarantees that the properties and characteristics of the soil will not change for 80 years.
• When adding colored preparations, it is possible to visually control the uniformity of primer application to the surface.
• Simplicity and convenience when covering areas both using mechanical devices and manually.
• These primer mixtures are safe for the human body and animals.
• Environmentally friendly, no pungent odor.
• They are highly resistant to the formation of fungi and mold.

Betonokontakt technical characteristics

This solution has the property of turning a smooth wall surface into a rough one and is classified as a primer. Due to the presence of quartz sand in the composition, concrete contact is capable of connecting almost any coating to the walls. Technical characteristics include:

• relatively high drying speed on walls. You can continue repairs within two hours after applying the solution;
• excellent moisture resistance. Concrete contact can be considered a waterproofing finish, because after drying, a waterproof film is formed on the surface of the walls;
• Due to protection from external damage, it can last for many years, which is a plus. The average lifespan is approximately sixty years;
• the consumption is not too high and on average you will need 290-390 grams of the mixture to treat one square meter of wall.

Thanks to these technical characteristics, concrete contact has gained wide popularity among both professionals and beginners in the construction business.

Why do you need concrete contact for interior work?

Among all the materials that are used to prepare surfaces for plastering or gluing tiles, concrete contact occupies a special place due to its versatility and unique adhesion - the ability to adhere to a wide variety of surfaces. With the help of this innovative primer, it is possible to carry out such complex connections of completely different materials as wood-glass, metal-tile and many others.

Such mixtures can be used when performing stages of work of any complexity, both during professional construction by experienced workers, and in domestic conditions for beginners during home renovations.

What is concrete contact?

Not everyone knows what it is. The popular concrete contact, the use of which ensures increased adhesion of finishing materials to walls and ceilings, is a special mixture for priming the surface being treated.

This primer is intended for surfaces that do not absorb moisture well.

The composition of concrete contact soil includes the following ingredients:

1. Portland cement.
2. Quartz sand.
3. Polymer filler.
4. Special additives.

Concrete contact is a polymer-based building mixture that is resistant to alkalis and increases the adhesion of the material to the base.

In online stores you are offered to purchase various brands of high-quality primers at a low cost with delivery or pickup. You can find out the cost of the product and order it on the company’s official website. Products are sold both wholesale and retail. Payment for the services provided is made in any way convenient for you.

When collaborating with our company, you have the opportunity to significantly save money and time while receiving high-quality products.

Consumption

It is all these signs that determine how much primer you spend per square meter of surface. This indicator is most often indicated on the packaging, because this is the most important characteristic that allows you to know how much material it costs to purchase, so as not to run around for additional materials.

The consumption of deep penetration primer depends on the following factors:

• the amount of primer used is affected by the material of the surface on which the material will be applied (metal, wood, stone);
• the composition of the primer itself, namely its elements, their proportion, which is directly specified by the manufacturer;
• the amount of material used is also affected by the type of further dye, glue and building material;
• Another important factor is the time of year and weather conditions.

All these factors in one way or another affect the future consumption of material. But there is still one parameter that affects the consumption rate - this is the method of applying the material, as well as the tools themselves that are used during work.

The tools you use to apply the primer have a direct bearing on how much primer you will use on the selected area. The substance itself is sold in containers of different sizes, you select the one you need.

The primer can be applied to a vertical surface using special tools. A roller is a fairly convenient way to apply material to vertical walls.

Roller

The most common option for painting hard-to-reach areas is a brush. The brush is used when applying material to seams, when processing corners and hard-to-reach places;

Brush

Sprayers are also used when applying primer.

Spray

The primer is available in a liquid version and has a transparent composition and can be used before gluing wallpaper; if you are processing wood, you should choose a moisture-proof material.

It contains pigments of a darkish color, which allows you to clearly see the boundaries of application when applying it, but you should understand that when using this type of primer, you should remember one rule: in no case should the primer be darker than the topcoat.

If it is metal, then 80-100 g per square meter is enough. You should know that when working on metal, it is necessary to use a primer without acrylic, this is due to the fact that rust does not appear on such a primer. But before applying primer to metal, it must be carefully prepared for use.

If before applying the primer the metal surface was used quite often, then there is clearly fluffy rust left on it, then you can easily get rid of it using the right tools (brush).

This is necessary so that the old metal does not absorb the primer, which means that if you do not treat the material in advance, you can spend twice as much paint and varnish materials during further processing. In order to treat a metal surface with a primer, you should choose one based on resins.

It can be used on both metal and concrete. 80-100 g per square meter is considered the most minimal indicator among all available bases. The consumption rate for deep penetration primer per 1 m2 based on acrylic is 120-150 g per square meter.

Acrylic primer easily and simply dissolves in water; you can buy it in the store in powder form or in the form of a concentrated liquid.

In its structure, such a mixture will resemble a simple whitewash, therefore, there is no point in using it on dark surfaces. This primer is good for painting with acrylic paints. Can be used both inside the house and outside.

The use of a primer before applying the base material to the surface is not the case. If you neglect this advice, then you can consider that the money spent on finishing materials is thrown away.

There are certain calculation rules based on which you can determine how much primer you will need to treat a particular room. The first thing to do is calculate the total area of ​​the room, but at the same time take into account its properties.

It is worth understanding that walls, floors and even ceilings have different density characteristics, therefore, it is worth calculating for each surface separately. The primer packaging indicates several indicators of material consumption.

Approximate material consumption values:

the primer based on acrylic can be consumed with an approximate value of 110-160 g / square meter;

Acrylic

the Knauf company's primer, which is used for walls, can be consumed from approximately 50 to 130 g/square meter;

Knauf

The approximate consumption of deep penetration primer (in general) is 100 g per square meter.

Briefly about the main thing

The primer is necessary so that after applying it, glue, paint or other wet compounds can be used without effort on the base.

Primer consumption depends on the condition of the base. You can also calculate it if you apply the composition to a piece of wall approximately 1 by 1 m, and then calculate how much mixture was used.

Concrete contact mixture is considered the most durable among the others. Of these, Knauf is considered the highest quality, which lasts up to 80 years and holds the base well with other materials.

The principle of applying concrete contact

Bolars concrete contact primer

In terms of quality characteristics, the primer does not always comply with GOST, and in general, it is not a product subject to mandatory certification. Many manufacturers rely on this, producing their products without proper control of production, technology and raw materials. To completely dispel all doubts about which concrete contact is better, watch the video in this article.

So, let’s clarify again: concrete contact primer, consumption per 1 m2 is on average 300 g/m2. Based on this, we try to adjust the specified standards to the actual thickness of the application.

General recommendations for all types of such compositions will tell you how to do this:

• Before using concrete contact, some surfaces are sometimes primed with a traditional compound to remove dust clots and increase adhesion.
• Concrete contact is applied to a dry surface using conventional painting tools: a roller or a brush. A brush with wide bristles is more productive in work.
• Before continuing finishing, you must make sure that the concrete contact layer is completely dry. Otherwise the work will be ruined.

Particular attention should be paid to the manufacturer's instructions, which indicate not only the primer consumption per 1 m2, but also the subtleties of working with it. But this is not the only thing you need to know when preparing to work with such adhesive material

There are also a lot of certain subtleties:

• Some formulations are ready for use immediately after opening the can, while others must be diluted with water. It would be a good idea to get information about the recommended surfaces that can be primed and which ones should be avoided.
• All this depends on the chemical composition of the substance and affects its performance characteristics. If a mixture intended for interior work is used to cover the facade of a building, this can lead to disastrous consequences after the last layer of finishing material has been fixed. And then the concrete contact primer will have a colossal consumption.
• Some people use special technical means to apply such substances. The packaging will necessarily indicate if this is possible and acceptable in relation to a specific mixture.
• Drying time may not be as stated in conditions of high humidity in the room. As soon as this happens, it is necessary to continue work immediately so that dust and dirt do not accumulate on the treated surface, which will harm the adhesive properties.
• The best concrete contacts are acrylic. They do not interfere with the penetration of air and do not disturb the microclimate of the room, no matter from which side they are applied.
• Concrete contacts can be safely stored in closed containers for a year. You just have to comply with one condition: the ambient temperature should not fall below zero degrees. If the mixture freezes, it will lose all its properties, but it is resistant to mold, fungi and parasites.
• An open jar/bucket or diluted mixture cannot be stored for a long time. Solutions dry out quickly. Especially those that are water based.

Betonokontakt acrylic primer “Luxorit”

Concrete contact is an inexpensive material. Therefore, when using it, you should not strive to reduce consumption, to the detriment of the quality of work. The lack of a concrete contact layer will bring more significant material losses than buying another package.

Consumption of concrete contact primer

Concrete contact consists of a building mixture (cement, sand, as well as special additives) and acrylic. It is often used to better bond the base, which almost does not absorb moisture before plastering, as well as before laying tiles or other finishing work.

This mixture has a number of advantages:

• dries quickly, which allows finishing within a couple of hours after applying the mixture;
• does not allow water to pass through due to the film created during drying;
• can last up to 80 years.

The quality of the repair will be good thanks to the use of such a primer.

The consumption of concrete contact per 1 m² depends on the characteristics of the base that needs to be processed. Basically, a lot of primer is needed on a porous surface, of which there are 3 types:

1. Absorption into brick or sand concrete occurs quickly, which allows the consumption of concrete contact per 1 m² to be up to 500 g.
2. Average porosity of concrete or tiles. The consumption for them is approximately 300 g per m².
3. 100 – 200 g per m² of primer is necessary for low-porosity surfaces.

Before using this mixture, it is necessary to determine the type of surface, as well as how much primer will be needed.

This video explains the benefits of concrete contact:

Deep penetration primer: consumption per 1m2

Each builder at least once in his life, due to his specialty, carried out work on the interior decoration of the premises

In this type of work, as is known, special attention is paid to the installation of walls, which in the future will become suitable for habitation

And the question of how and in what ways to prepare the wall for visual decoration constantly remained open. It is worth noting that for this type of work there is a wide range of building mixtures and solutions that are tailored specifically to each type of wall. One such solution is a primer.

The modern construction equipment market is quite rich in this kind of raw material. And, as a rule, each primer is suitable for a specific type of wall and its material, and also has its own qualitative and quantitative consumption for the surface area to be painted.

Moreover, the use of a primer mixture leads to the fact that the saving of paint material is reduced to two times. The use of a primer solution leads to the fact that signs of the presence of various bacteria and fungi, as well as lichens, completely disappear on walls or ceilings.

To understand this issue in more detail, we will try to carefully analyze each brand of soil mixture for walls.

Consumption calculation Betonokontakt primer KNAUF Betokontakt / KNAUF Betokontakt (20 kg)

Fast and inexpensive delivery, as well as unloading and lifting to the apartment on any floor.

Expert advice, assistance in selecting materials and calculating the required quantity.

Return within one month or extended return period until the end of the repair * for only 5% of the cost of materials.

All materials are stored in dry warehouses, have certificates and quality passports.

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Cost of unloading and lifting

If there is a working freight elevator, the cost of unloading 1 ton of cargo, taking into account the lift to the apartment, is 1,200? regardless of floor.

In the absence of a freight elevator, the cost of lifting 1 ton of cargo to one floor is 1,200?.

The cost of simple unloading of vehicles without lifting to the floor is 1,200 rubles per ton.

The minimum cost for a loader is 300 rubles.

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