Concrete contact – effective primer for walls

A specific primer called concrete contact is used to improve the adherence of stucco, plaster, and other finishing materials to dense, smooth surfaces. It acts as an essential base layer to guarantee that later coatings adhere to the wall. When working with concrete or masonry surfaces that might otherwise find it difficult to hold onto a top layer, this kind of primer is especially helpful.

The ability of concrete contact to produce a textured surface that improves grip is one of its main advantages. Sand or fine aggregates are a part of the primer’s special composition, which gives it this texture. Its application results in a roughened layer that strengthens the mechanical bond between the finishing material and the wall, lowering the possibility of peeling or detachment over time.

Concrete contact also has the benefit of being versatile. It works well on many surfaces, such as painted walls, pre-cast concrete, and concrete blocks. Because of this, it is a necessary tool for both new construction and renovation projects where it is crucial to ensure a long-lasting and durable finish.

Concrete contact not only improves adhesion but also seals the wall surface, lowering porosity and halting moisture infiltration. This combined effect increases the wall finish’s overall longevity and durability while also reinforcing the bond between layers. Professionals can apply plasters and finishes more smoothly and reliably by using a primer like concrete contact.

In the end, concrete contact is a useful addition to any toolkit used in building or remodeling. With its capacity to enhance adhesion, seal surfaces, and accept various materials, it is an essential tool for attaining superior, long-lasting wall finishes. The performance and look of your finished walls can be greatly improved by using this primer in your preparation process, whether you are a contractor or a do-it-yourself enthusiast.

Feature	Description
Adhesion	Concrete contact improves the bond between surfaces, ensuring a strong connection.
Application	Easy to apply with a brush or roller, suitable for DIY projects.
Drying Time	Typically dries within a few hours, ready for the next layer.
Surfaces	Works on various surfaces like concrete, plaster, and drywall.
Preparation	Requires clean, dust-free surfaces for optimal results.
Durability	Enhances the longevity and durability of the final coating.

Why is concrete contact for

Concrete contact’s primary goal is to guarantee materials’ unwavering adherence while concurrently strengthening the basis.

In numerous instances, using concrete contact is appropriate:

• before plastering the surfaces with low moisture absorption (concrete, painted);
• wall treatment before wallpapering any surface (brick, whitewashed);
• use before painting rough, cracked, dusty walls;
• to simplify work with tiles, glass;
• when installing concrete screeds, as well as under self-leveling floors.

Following the application of concrete contact, a strong, solid layer will be the final surface. The final coatings will not chip or crumble with time, and they will stick to the base flawlessly.

An excellent substitute for time-consuming wall and ceiling bandaging is concrete contact. Throughout the Soviet and post-Soviet eras, finishers and builders alike employed this technique. The mesh does not need to be glued or nailed anymore thanks to PVA glue. Without sacrificing quality, the novel primer solution removes the need to clean the walls of the previous coating.

Crucial! Plastered surfaces are made safer in the winter by the waterproofing layer that forms when the composition dries. The plaster under the concrete contact layer won’t come loose until spring.

Composition and main characteristics

Betonokontakt is an acrylic-based suspended solution that contains cement, sand that has been cleaned up, and certain fillers like fungicides that stop mold from growing. A filler made of 300–600 micron quartz particles produces a rough surface. Polymer adhesives give the mixture a high degree of adhesion.

The fundamental elements of concrete contact are as follows:

• acrylic dispersion;
• quartz sand;
• cement;
• chemical modifying additives.

The primer layer is endowed with the following characteristics by a variety of chemical composite additives that manufacturers incorporate into their products:

• vapor permeability (allows the surface to "breathe");
• hygroscopicity (perfectly absorbs moistened moisture, which is important when applying plaster or putty);
• resistance to mechanical influences (shocks, vibrations);
• resistance to biological interaction (prevents the appearance of mold).

A safe and environmentally friendly building material is concrete contact. Pathogens and insects are kept at bay by disinfecting components.

These solutions don’t react with lime or cause metal to corrode because of their neutral acidity. The application of primer is more visible when color pigments are used.

Crucial! GOST 28196 must be followed in any concrete contact of any kind involving an acrylic copolymer and a water-dispersion composition.

The use of concrete contact primer is crucial as it enhances the bonding ability of plaster or concrete on smooth surfaces such as walls. By serving as a bridge, this primer lowers the possibility of peeling or cracking over time by ensuring that the fresh layer of plaster or concrete adheres firmly. Concrete contact is a simple and highly effective method that improves the longevity and durability of construction projects. It is an essential step in achieving a strong and dependable finish on any wall surface.

How to apply concrete contact?

Instead of preparing this mixture yourself, it is more convenient to buy a fully prepared solution in volumes of 3, 5, 20, and 50 liters. You must shake the jar’s contents after buying one of these concrete contacts to ensure that the quartz filler is mixed into the mixture evenly. Several times while working, the primer is stirred.

A dry primer that needs to be diluted with water is available for purchase. The finishing material’s adhesion will be slightly reduced if the amount of liquid is exceeded.

Before beginning work, the majority of manufacturers advise cleaning off areas that don’t adhere well, glue, grease, and bitumen drips.

Depending on the terrain, apply concrete contact to the base one or two times. The previous layer must dry before the next is applied. A brush or roller can be used for smaller amounts of work.

Expert builders use spray guns to assist them. The instructions specify that using mechanical devices is an option. One version of the mixture in an aerosol package is available in stores.

You must consider the following variables when determining how long it will take for concrete contact to dry:

• number of layers being laid;
• ambient temperature;
• relative air humidity.

When the weather is right, drying outside will take two to four hours. In a sealed space with a temperature of +25°C and a relative humidity of 65%, the wall will be fully prepared for additional work in 12 hours.

Such a primer layer has an 80-year service life. When working, the ideal air temperature range is +5 to +35 degrees Celsius, and the recommended humidity range is 60 to 80%. In cold weather, betonokontakt should not be used.

Primer consumption

The porosity of the surfaces being treated determines how much betonokontakt is used per square meter:

• 500 g / m2 and more for a highly porous base (ash block, wall plastered with a clay-sand mixture);
• 300-350 g / m2 for concrete slabs or brick walls of medium porosity;
• 150 g/m when covering smooth and slightly porous surfaces (paint, metal, glass, ceramics).

If the concrete contact hasn’t dried for 48 hours, the amount of concrete contact needed must be doubled. Another treatment of the wall will be necessary. The truth is that dust particles adhere to the rough layer, deteriorating the manufacturer’s claimed technical attributes.

Review of the best concrete contacts

Concrete, brick, wood, metal, glass, tiles, painted, and whitewashed surfaces are all treated with concrete contact mixtures. Products for nearly every kind of coating are made with slightly different compositions.

Solutions vary in terms of cost. The primers in the rating that is being displayed are from reputable manufacturers that follow GOST guidelines and have garnered the most favorable feedback from builders.

Concrete contact Axton

Marble chips added to a premium dry mix makes it appropriate for both indoor and outdoor use. Mix the powder with the necessary amount of water, as directed by the instructions.

Applied to uneven surfaces that don’t require prior cleaning. Concrete contact Axton uses 300 g/m^2 and dries in three hours.

• does not require surface preparation;
• dries quickly;
• affordable price.

• increased consumption;
• it is necessary to prepare a solution from a dry mixture.

Review by 39-year-old Andrey: I primed the bathroom’s gypsum walls. I regret not using this method sooner as it was my first time using it. It took me half the time to lay the tiles.

Betonokontakt Bolars

Betonokontakt Bolars is prepared for usage in its entirety. You must remove any grease, dirt, and dust from the surface before beginning work. The mixture is consumed on average 300 g/sq.m. exhibits superior adhesion qualities even on the smoothest vertical surfaces.

Walls and ceilings can be better prepared for the application of gypsum, cement, and polymer solutions with the aid of Bolars.

• excellent adhesion quality;
• withstands harsh Russian winters;
• adequate price;
• does not require a second coat.

• surface preparation is necessary.

33-year-old Mikhail’s review: I made the decision to try something new by replacing the old tiles on the kitchen apron. The space is tiny, and I was successful using bolars. Outstanding concrete contact that reduces costs and saves time.

Knauf concrete contact

The primer mixture’s special composition enables it to be applied to any surface with a variety of porosity parameters. 1.4 kg/m3 is the application density. By strengthening loose bases and eliminating microcracks, Knauf concrete contact improves surface adhesion, waterproofing, and fire resistance.

• universal application;
• does not require dismantling old coatings;
• resistant to alkaline compounds;
• economical consumption;
• eliminates microcracks.

• high price;
• requires accuracy, as it is difficult to wash off.

Review by thirty-year-old Igor: In the hallway, we put the wallpaper back. The plaster had cracks in it and the walls were uneven. Knauf primer covered the flaws quickly and easily. Thick wallpaper applied with remarkable clarity and adherence.

Ceresit concrete contact

A safe product that can be used for any building or repair task is betonokontakt st 19. You can adjust the applied layer’s thickness with pink pigment.

Enhances the strength properties of the cement-sand plaster, tile adhesive, and other finishing materials to a significant degree on vertical concrete surfaces. Surfaces that have betonenokontakt ceresit still have the capacity to transmit water vapor. The mixture’s composition poses no health risks to humans at all.

Consumption ranges roughly from 300 to 750 g per square meter depending on the surface being treated.

• very high adhesion;
• no hazardous chemicals;
• quick drying;
• reasonable cost.

• it is not always appropriate to apply a pigmented layer.

Evaluation of 47-year-old Nikolay: It had previously been impossible to putty over old concrete due to the lack of such primer. This isn’t an issue anymore. I utilize Betonokontakt Cersit for the trickiest parts of finishing tasks.

Conclusion

The development of betonokontakt has made many finishing tasks for facades and interior spaces easier. By employing this special primer solution, builders have raised the bar on the caliber of their finished work.

It is an indispensable material due to its excellent performance characteristics, durability, and reliability of concrete contact. The adhesive and other beneficial qualities of their products are continually being improved by the manufacturers, who don’t stop there.

There are several advantages to using concrete contact as a primer for walls, which makes it an important component of any building or remodeling project. Enhancing the adhesion of fresh coats of plaster, paint, or other finishing materials to the preexisting concrete or masonry surfaces is its main function. This lessens the possibility of peeling or cracking over time and guarantees a finish that is more resilient and long-lasting.

The ability of concrete contact to produce a rough, textured surface that offers superior grip for later layers is one of its most notable qualities. A strong bond can only be achieved with this texture, especially in areas that are frequently wet or used heavily. You can greatly increase the general caliber and durability of your wall finishes by using concrete contact.

In addition, applying concrete contact is simple and easy to use. Whether you are an experienced contractor or a do-it-yourselfer, the procedure is easy to follow and needs little setup or tools. Because of its accessibility, it’s the perfect option for a variety of projects, from big-scale commercial construction to minor home upgrades.

To sum up, better outcomes can be achieved by including concrete contact in your wall preparation process. In addition to improving surface integrity and adhesion, it also helps guarantee that your walls will stay gorgeous and sturdy for many years to come. Concrete contact is a practical and dependable option for anyone hoping to achieve finishes of a professional caliber.

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