Primer "Betonokontakt" from the company Knauf: technical characteristics

Primer "Betonokontakt" from the company Knauf is widely used for the treatment of problem surfaces in the repair and construction. The material is intended for impregnation of complex substrates with low absorbency and poor adhesion.

Primer mixture "Betonokontakt" is intended for coating concrete, reinforced concrete, plasterboard, gypsum, brick and lime bases. The material is a universal tool used for surface treatment before painting, tiling, plastering and wallpapering. The composition has proven itself when working with metal surfaces, and is suitable for preparing any metal to apply a decorative layer or plaster.

The primer adheres well to the problem base and provides reliable adhesion with the subsequent layer. This happens due to the presence in the composition of the primer mixture of fine alkali-resistant sand, which forms a rough surface structure that can well hold the finishing material applied to it.

The advantages of the material include several points.

• The main advantage of "Betonokontakt" is the possibility of its use on loose and crumbling surfaces. The primer not only slows down the destruction of the problem base, but also increases its strength and normalizes the porosity of the material. The mixture is suitable for processing wooden elements that come into direct contact with the soil. This greatly expands the scope of application of the primer, making the material even more popular and in demand.
• Another advantage of the composition is the ability to neutralize chemical reactions that occur during the application of lime or gypsum plaster on cement.This makes it possible to perform finishing work without fear for the incompatibility of these dissimilar materials.
• Among the advantages noted the possibility of mounting stucco on a smooth base. To do this, just treat the surface to be decorated with “Betonokontakt” and wait for it to dry completely.

• Thanks to "Betonokontakt", it became possible to lay a new ceramic tile on the old one without having to dismantle it.
• The undoubted advantages are the possibility of strengthening the dusting concrete base without the use of fiberglass and a significant reduction in the consumption of liquid types of finishing materials.
• Attention should also be paid to the ability of the primer to not allow water from self-leveling mixtures to pass through the base. Due to this quality, the formed layer does not lose moisture, which contributes to the normal setting of the solution, and prevents its cracking during the drying process.

• "Betonokontakt" is alkali resistant material and is suitable for manual and machine application. With it, you can securely fasten a variety of materials, including glass, wood and metal.
• The advantages include the durability of the treated bases. The primer is able to maintain its performance for 80 years, without cracking and collapsing over the entire period of time.
• Excellent waterproofing properties of the primer serve as a reliable barrier to the penetration of moisture into the base, which allows the use of "Betonokontakt" when finishing rooms with high humidity and a tendency to the formation of condensate.
• The material dries very quickly, and makes it possible to begin finishing work within a few hours after its application.
• The advantages are also the uniform distribution of the mixture over the surface and the absence of harmful components in the composition of the solution.

The disadvantages include the need to apply the next layer immediately after the primer dries, otherwise the rough surface will become dusty and will partially lose its high adhesive properties.

Primer "Betonokontakt" is presented in the form of a sticky mixture with the addition of crushed quartz sand. The presence of these two basic components is the reason for the ability of the material to provide high adhesion between adjacent layers of finish. The composition has a pink tint that allows you to control the uniformity of its application to the surface, and helps to immediately see the unpainted areas.

The material is available in two versions - with a fraction of 0.3 and 0.6 mm. The first type is used for surface treatment before puttying, and the second - before applying plaster.

The acidity indicators of the soil correspond to the pH values ​​of 7.5-8.5, which indicates the neutrality of the solution. The mixture can be used for both external and internal work, retains operational properties in the range from -40 to +60 degrees and can withstand up to 5 freeze-thaw cycles. In undisclosed packaging, the mixture can be stored for 18 months.

The average consumption of "Betonokontakt" is 20 kg per 60 square meters and depends on the structure and type of base, ambient temperature and the required number of layers.For example, 200 g of the mixture will be required for processing one tile of a tile, while 350 grams will be required for painting the same area of ​​a concrete base.

The composition of "Betonokontakt" includes additives from fungicidal preparations, due to which the appearance of fungus or mold on the treated surfaces is completely excluded. Despite the excellent moisture resistance of the primer, the material has good ventilation and provides complete air exchange in the room. Soil is available in plastic containers with a capacity of 5, 20 and 22 kg.

The average cost of the material is 2.5 thousand rubles for a bucket weighing 20 kg. The solution is completely ready for use and does not require additional dilution with water.

It is important to know the following:

• Before starting work it is recommended to thoroughly mix the solution using a construction mixer or electric drill with a paddle attachment. This must be done in order to fine particles of quartz sand evenly distributed throughout the volume of the mixture.
• Then prepare the work surface by removing mechanical debris and dedusting.

• Despite the fact that the primer is completely ready for use, it is allowed to dilute the mixture with water to reduce material consumption. However, with manual application, the amount of liquid should not exceed 50 ml / liter. For surface treatment by spraying, as well as for painting soft bases, it is allowed to dilute the mixture with water in a 2: 1 ratio.
• "Betonokontakt" can be used in conjunction with soils of deep penetration, which are applied first. Processing is made in two layers, and the layer of "Betonokontakt" is applied after the full drying of the previous one.
• It is easy to check the complete readiness of the treated substrate for the application of the finishing layer: it is enough to touch the primed surface. If the formed layer has ceased to stick, you can apply the following coating. On average, it takes 12 hours to completely dry the primer.
• The temperature of the surface on which "Betonokontakt" is applied should not be lower than 5 degrees. The use of primer in negative temperatures is prohibited.

Primer "Betonokontakt" is a popular finishing material and is in high demand. Consumers note the ecological safety of the solution, excellent technical characteristics and full compliance with GOST, what allows to carry out priming of surfaces in the enclosed space without use of means of individual protection.

Attention is paid to the ease of application of the solution and the ability to control the uniform distribution of the mixture.

The pink color of the material helps to prevent the formation of untreated areas, which increases the overall quality of finishing works.

There is a reliable protection of concrete from the appearance of bacteria and mold, as well as the possibility of strengthening unstable bases. The ability of a material to ensure good adhesion of dissimilar materials, such as wood and glass, is highly appreciated. Of the minuses there is a high cost of material in comparison with traditional primer compositions.

"Betonokontakt" well-known brand Knauf has practically no worthy analogs in its segment in the market of finishing materials.

How to choose a primer, see the following video.