Primary consumption of Knauf Betokontakt per 1 m2

Knauf Betokontakt is a unique building material in its properties. The peculiarity of the primer is that it can be applied as a separator on different layers, thereby ensuring their strong coupling to each other. Primer Betokontakt perfectly fits on tile, paint and other smooth surfaces, improves adhesion, which makes it possible not to dismantle the old coating, but to puttying and subsequent finishing on top of it.

Primer Betokontakt is an acrylic dispersion mixture that provides high adhesion to the surface. After hardening, it forms a rough pink film. Thanks to its unique characteristics, Betokontakt from Knauf can be applied to expanded polystyrene, concrete constructions, and drywall.

It is used for the following purposes:

• it is applied on concrete as an impregnation, preparing the surface for the subsequent application of glue;
• strengthens and strengthens the surface with a small density before plastering;
• it is applied on the surfaces covered with oil or alkyd paint when their further finishing is necessary;
• as a pre-treatment for sticking stucco;
• for the preparation of steel structures for subsequent filling.

The advantages of the primer Betokontakt Knauf include the following features:

• vapor permeability, since the surface can "breathe";
• resistance to the formation of mold and fungus, due to the fungicidal additives contained in the solution;
• moisture resistance;
• ease of application, and can be used for both manual and special equipment;
• fast drying (under optimal conditions, the drying time is 12 hours);
• long service life (up to 80 years).

The manufacturer recommends that you mix it thoroughly before starting work. Thanks to its ease of use and high quality, Betokontakt is convenient to apply manually.without using complex construction tools. To cover the surface of this primer can even a beginner who has little experience in the repair and construction. Due to the pink color of the composition, it is easy to control the application of the primer so that there are no uncovered areas.

The disadvantages of Betokontakt can be attributed to the fact that, after drying the layer, you should immediately dull to the next steps of finishing. Delay will cause dust and construction debris to sit on a rough surface, which will significantly reduce its adhesive properties and the final result of the repair.

Knauf manufactures Betokontakt of the following types:

• with a fraction of 0.6 mm (for draft alignment);
• with a fraction of 0.3 mm (for application under the putty).

The amount of primer needed depends on the porosity of the surface to be applied.

To determine the right amount of Betokontakt, you can use the following data:

• for surfaces with high porosity (brick, concrete slabs, stone) the optimal consumption per m² is 0.4–0.5 kg;
• for materials with an average porosity coefficient (monolithic concrete, decorative brick, concrete pouring floors) the consumption is 0.2–0.38 kg per square meter of the treated surface;
• surfaces with a low porosity ratio (concrete constructions, ceramics, oil and alkyd enamel, glazed tiles), the optimal consumption is 0.15–0.25 kg per 1 m².

In order to slightly reduce the consumption of Betokontakt primer, a usual primer is applied to the surface, which, after drying, reduces the porosity of the material. This method is most often used for highly porous surfaces, but it can reduce the adhesion of the Betokontakt agent.

You can also determine the consumption rate per 1 m² using a test application, why do the following steps:

• on the treated surface measure square 1x1 m and limit it with a masking tape;
• Thoroughly mix the primer before applying and pour 500 ml in a small container;
• weigh container with primer and brush or other equipment used for application;
• apply primer in accordance with the recommendations, ensuring a high quality coating;
• weigh the container again together with the tool and the primer left in it;
• The resulting value is the consumption of Betokontakt primer per 1 m². To calculate the required amount of primer, this figure must be multiplied by the processing area.

Before covering the surface with Betokontakt primer, it should be carefully prepared. To do this, it is cleaned of debris and dust by hand or with a construction vacuum cleaner. Before applying the composition is thoroughly mixed, preferably with the help of a construction mixer in order to evenly distribute fine sand in the primer. In no case is it recommended to dilute the composition with water., because from this he will lose all his properties. However, some manufacturers allow dilution of the composition with a small amount of water in order to save.

When working with Betokontakt Knauf primer, the following rules must be observed:

• the temperature in the room where the work will be carried out should be in the range from +3 to +30 degrees;
• air humidity should not exceed 75%;
• Subsequent work can be carried out only after the primer is completely dry, that is, after 12–15 hours.

After applying Betokontakt, it is necessary to check the quality of the coating. This is necessary in order to notice the defects of the primed surface in time and eliminate them in order to achieve good adhesion. To do this, it is necessary to hold a spatula of metal or rubber over the dried soil, look at the crumbling of sand particles. If they are easily and in large quantities removed from the surface, then such a coating can not be called high-quality, and also finishing materials will not hold well on it.

Betokontakt Knauf is a primer that allows you to prepare many surfaces for finishing, including metal, drywall and other materials. The main thing is to follow the manufacturer's recommendations and application technology, as well as to prepare the treated surface well.

In the next video you will see an overview of the primer Knauf Betokontakt.