Betonokontakt consumption per m2. We optimize the consumption of concrete contact. Case - how to make an accurate calculation of consumption

Primer Betonokontakt is a polymer dispersion consisting of cement, quartz sand, adhesives and acrylic. The main purpose of use is strengthening surfaces for further strong contact with the finishing material. The most common is surface treatment for further plastering. Applying the primer Betonokontakt under the plaster will make the connection almost monolithic. After that, even when working with a perforator, the top layer will not crack and will not fall off the cake.

The soil is not cheap, and our readers are interested - what is the consumption of Betonokontakt per 1 m²? Firstly, it depends on how porous the work surface is, and how intensively it absorbs moisture. But how in this case to save money, and is it necessary to do it? Let's figure it out.

Consumption rates

From the name of the material it can be seen that it is intended mainly for coating concrete surfaces. But practice has shown that the dispersed primer Betonokontakt works great almost everywhere. on brick walls, plasterboard partitions and ceilings, even on smooth ceramics. It is successfully used as a connecting base for linoleum. It can be applied to vinyl surfaces and old paint under plaster. But you need to spend Betonokontakt wisely. Even on surfaces made of the same material, the flow rate may differ from the calculated value.

A primer from any manufacturer, whether Prospectors, Knauf or Ceresit, is consumed depending on the porosity of the building surface. Therefore, the main factor is its absorbency.

For example, a brick has a greater porosity than a ceramic tile, which means that the consumption of Betonokontakt will be greater.

So let's take a look and see:

1. For material with high porosity characteristics(concrete slabs, brick surfaces, porous natural stone) consumption rate - 0.3-0.5 kg per 1 m 2. For those who plan to save a little on the cost of materials, there is a way to reduce consumption - pre-saturate the work surface. If this is a tree, add another layer of antiseptic.
2. Concrete monolith has medium porosity, cement-poured floors, concrete tiles, decorative bricks. For such materials, the consumption of Betonokontakt is 0.2-0.35 kg per square meter.
3. Materials with low porosity and smooth surfaces absorb less. Ironed concrete, ceramic surfaces, old oil paint, glazed tiles - for them the average consumption is 0.15-0.25 kg per 1 m 2.

Since Betonokontakt contains sand, special additives and cement, The quality of the primer can be judged by the adhesion of the sand to the work surface. It is enough to draw a rubber or metal spatula over the dried layer - if the sand crumbles, it is recommended to apply another layer. Thanks to the colored (most often pink) color of the primer, it is immediately clear whether unimpregnated ones remain on the surface.

Case - how to make an accurate calculation of consumption

For example, let's take the KNAUF Concrete Contact. Consumption figures declared by the manufacturer: 0.35-0.4 kg / 1 m 2 Let's check them in practice. Professional builders recommend applying a test layer with measurements. To do this, take exactly 1 m 2 of the surface on which the primer will be applied. We have a cleaned wall with old plaster. You can draw a square with chalk. For convenience, we limit it with masking tape. We take a jar with a tool (we have a brush). Let's put it on the scales. Pour so much Betonokontakt into the jar so that the total mass is 1 kg - for ease of calculation.

We apply the primer, painting over the entire square without gaps. We weigh again. On the scales 620 g.

Therefore, for 1 m 2 we took 380 g of soil. That is, the real consumption for this wall is 0.38 kg / m 2, that is, it corresponds to the declared one. By multiplying the resulting figure by the area of ​​​​the walls in the repaired room, you can find out exactly how much Betonokontakt will be needed.

Maybe dilute it with a little water?

Concrete contact is made on the basis of acrylic additives, therefore diluting it with water to save money is completely useless and even harmful. Water will make the solution inhomogeneous, and it will lose its properties. The price of Betonokontakt should not suggest savings, because it holds building surfaces much stronger than conventional primers, even deep penetration ones. Therefore, it should not be diluted with water.

Fictitious savings will result in real financial losses. Cracking plaster, and peeling layers and falling off pieces of the wall will definitely not please you. Don't take risks!

And if you spread thinner?

If you try to reduce the consumption of Betonokontakt by applying a thinner layer, then the subsequent adhesion of the coating to the working surface will also decrease. In addition, the waterproofing properties of the layer will also deteriorate.

If there are no “unpainted” places left on the working surface, the priming can be considered completed.

Betonokontakt dries at room temperature in 2-4 hours. It is impossible to apply primer at zero or sub-zero temperatures, just as it is impossible to let it dry in the cold. But at the same time, the finished surface can withstand five freezing cycles down to -40 0 С.

After drying, the surface can be processed further - plastering, laying tiles, gluing wallpaper or vinyl film. Do not leave the primed surface for a long time so that dust does not settle on it.

User and expert reviews

Vladimir Ivanchenko, finishing master, independent expert in the field of plasters, primers and paints and varnishes:

“Before you find fault with the soil, they say you bought a bucket, but it wasn’t enough for half a wall, make sure when buying that the product is certified. Some unscrupulous sellers act very simply - as if “accidentally”, “it was damaged during transportation”, overwrite the date of manufacture or the country of origin on the label. So they can sell you an expired or frozen product, or pass off a local spill mixture as a quality Ceresite, and increase the price. Pay attention to the color of the plaster - it should have a pinkish tint. Packaging also matters - only in branded buckets or barrels. Different jars-bottles are unacceptable!

Ivan Andreevich, pensioner:

“In order for the consumption to coincide with the promised, the main thing when using Betonokontakt is to follow the application technology. That is - on a dry, dust-free surface, let it dry well, buy a certified Betonokontakt. Here I am in the kitchen laying tiles on the painted walls. At first he beat off the paint with an ax, a chisel, even tried it with a grinder and a perforator. Then he spat and bought Betonokontakt Prospectors. I did everything right, and for three years now I have not worried about whether the tile will fall off or not. Although I doubted before work - the novelty is still.

Sergey, plasterer:

“I don’t understand many on the forums, why are you so angry at this pink primer? I am not a fan of Betonokontakt, but I often have to use it. I try to apply sparingly, but still I make sure that everything is saturated. For example, under ceramic tiles, if the paint is holding tightly, or on a bare concrete slab under a tile. But I always make a notch on the paint - I didn’t check it without it, but no one has yet complained about a bad result. True, I ask you to pay extra for a notch - hard and tedious work. Ceiling leveling - please, also Betonokontakt, although we also clean everything up to the slab, if possible - whitewash, paint and other things.

findings

1. When buying, check the authenticity of Betonokontakt. There is a risk to buy "water". Ask the seller for documents. The inscriptions on the container must be visible and clear.
2. Prepare the surface correctly - this will reduce consumption.
3. Do not dilute Betonokontakt with water.
4. Apply a primer when all dusty work in the room is finished.
5. If the soil is completely absorbed, go through again. Leave no smear marks.
6. Always smile!

A primer is a unique solution that is used to prepare a specific surface for finishing, such as painting. The use of such a building mixture allows you to level the surface, get rid of any defects on the wall and eliminate small cracks.

One of the most popular types of primer is concrete contact, the use of which greatly simplifies further finishing work.

Betonokontakt - a building mixture based on acrylic, also includes cement, sand and special additives. This mixture is actively used to increase the adhesion of a surface that does not absorb moisture well, before plastering, tiling and other finishing work.

Among its main advantages are the following:

• high drying rate. Further finishing work can be started a few hours after applying the primer;
• moisture resistance. During the drying process, a special film is formed that does not allow water to pass through;
• durability. According to the manufacturer, the concrete contact primer has not lost its qualities for 80 years.

Due to its unsurpassed properties, betonokontakt was able to establish itself as a unique material that is durable, does not need a lot of time to dry and does not let moisture through. It is these properties that allow you not to worry about the quality of the repair done.

How to determine the consumption of concrete contact?

Concrete contact consumption per 1 m2 depends on many factors, among which the first place is occupied by the features of the treated surface. It is not the type of the surface itself that is important, but the porosity. It depends on it how much primer will be absorbed, which has a direct impact on its consumption per m2.

Depending on the porosity, the following types of surface are distinguished:

1. Porous surfaces, which include brick or sand concrete. The primer is absorbed quite intensively, which leads to the consumption of concrete contact up to 0.5 kg per m2. If the porosity is too large, then you will first need to treat the surface with special solutions.
2. Surfaces with medium porosity. These include concrete, concrete tiles. The consumption of concrete contact is about 0.3 kg per m2.
3. Low porous surfaces, for which the primer consumption is minimal - 0.1-0.2 kg per m2.

Before carrying out work, it is necessary to determine the type of surface and the level of primer consumption per 1m2. To do this, it is enough to apply a primer solution to a certain area. We pour a little solution into a container, determine the weight and begin to apply exactly on 1 m2 of the site. After that, we measure the weight again, and based on the data obtained, it will be possible to draw a conclusion about the amount of concrete contact primer required to process the entire surface. Such calculations allow you not to buy an extra amount of material.

Most people are wondering if it is possible to reduce the consumption of concrete contact primer. The answer is clearly no. First of all, this building mixture has an affordable price, so there is no point in saving on it. In addition, this can cause a decrease in the strength of the material, which will begin to crack or flake over time.

It should be remembered that the quality of the primer and the work done on its application has a direct impact on future finishing work and the quality of the entire repair as a whole. If you reduce the amount of concrete contact primer per m2, then the surface will lose its ability to adhere. In the future, this may cause the coating to separate from the substrate.

The primer plays an important role in the process of ensuring the waterproofing of the surface, which can be disturbed by reducing the amount of mortar per m2. You should also not forget about the important feature of some finishing materials, which is that some coatings can dry out. The fact is that gypsum or Portland cement is present in their composition, and drying becomes a natural reaction to a decrease in the amount of water.

Reducing the cost of concrete contact per m2 can cause cracks or complete peeling of the plaster. As a result, you will have to re-do all the work, which will lead to even greater financial costs.

Thus, the use of concrete contact is essential for the future of the entire repair. All the nuances of using this building mixture should be taken into account. Concrete contact consumption level per m2 depends on the type of base and its porosity. You should not save when applying a primer, as this can negate all further finishing work.

Content

Betonokontakt is a primer that is used to ensure good adhesion of the base and plaster or finishing materials. It transforms a smooth surface into a rough one, allowing the coating to securely adhere to the wall. The composition of the mixture includes quartz sand, acrylic and special glue. Concrete contact consumption per 1 m2 of the base area may differ slightly, so this point should be given special attention.

Costs are almost always indicated by the manufacturer on the packaging of the product. But if they are not here, you should consider average indicators that allow you to determine the required amount of material for the purchase. Concrete contact consumption per 1 m2 will depend on several points. This is the manufacturer, the composition of the mixture, the features of the processed base.

Surface types

First of all, the type of base that is to be processed affects the waste of the solution. It should be noted here:

Important! In some cases, it is enough to apply one layer of the mixture. But be sure to check whether it is enough for a quality finish. If it is clear that the primer covered the surface unevenly, after running the sand over it with your hand, the sand begins to crumble, then the processing procedure should be repeated.

When you need to know exactly what volume of goods to purchase, a calculator will help you calculate the consumption of concrete contact per 1 m2. This is a special program available for free on many specialized sites. It was developed by qualified builders, so there can be no errors in the data provided.

To use the calculator, it is enough to specify the type of product used, the type of base to be processed, the number of layers. After a few seconds, you will be able to see the calculation results. Is it worth spending time on such procedures? The figures above are quite accurate. It is only necessary to correctly determine the type of surface by the level of its porosity. This will be easy to do. But to obtain complete confidence in the reliability of the figures found, you can also use the help of an automated calculation system.

Preparing walls for painting, plastering or other processing always involves the maximum leveling of the base. If formally, according to the descriptions of the compositions, it turns out that they can also lie on uneven surfaces, it’s not worth the risk once again. When finishing concrete, a concrete contact primer comes to the rescue.

Peculiarities

Adhesion between two dissimilar materials is often a major problem in finishing. Primers such as betonokontakt increase adhesion, even if the substrate does not absorb moisture well. The composition of such materials includes sand, cement and some special additives (they are determined by the recipe of the mixture). The rough outer layer created by the contact primer is formed by sand, and cement helps it to better adhere to the surface.

In the production, only environmentally friendly materials are invariably used, which do not emit bad odors and do not spoil the appearance of the walls.

Application and characteristics

You can use the material once after shaking. It is recommended to use it to:

• prevent the destruction of paint on dry plaster;
• facilitate plastering;
• improve the adhesion of tiles to concrete walls;
• close seams and cracks;
• reduce premature shedding of finishing materials.

The Knauf brand primer contains acrylic, which gives it increased resistance to moisture. At the same time, the quality of surface preparation is not worse than that of most other auxiliary materials (and sometimes even better).

Issued:

• both a universal mixture and adapted directly for interior work;
• both large fraction and small fraction.

A carefully thought-out recipe and production technology allows the primer to remain unharmed for many decades.

After applying to the wall, it is enough to wait a few hours, and then immediately proceed to the main surface finish.

The German concrete contact is painted pink. It is designed to impregnate substrates that are not able to absorb glue or leveling compound. The polymer dispersion composition helps even in cases where the previous finish is not dismantled, but overlapped.

Betonokontakt is suitable for lubrication:

• tiles;
• expanded polystyrene;
• drywall.

The leveling mortar laid on the primer dries evenly. Thanks to pre-treatment, it will be possible to reduce the amount of plaster or paint used. Betonokontakt has antiseptic properties. It effectively suppresses the occurrence of foci of any pathological microflora. When using it, the permeability of the intermediate layers of the finish increases, and because of this, the ventilation of the premises is facilitated, their exchange of air with the outside world.

The material from Knauf has a neutral acid-base balance. It retains its positive characteristics both in frost at -40 degrees and in heat up to +60 degrees. Due to the absence of toxic components, Knauf concrete contact can be used even where ventilation is unsatisfactory - there will be no harm to the health of households.

In a container of the most practical capacity (5 or 20 kg), the primer retains its characteristics for up to 1.5 years, unless the tightness is broken.

More about primer concrete contact Knauf- in the next video.

Mixture consumption

The consumption of high-quality Knauf concrete contact per 1 m2 is a very important and urgent issue. Professionals, and even those who have ever worked with such compositions, will say for sure that this indicator is determined by the type of surface, its initial state and the level of moisture absorption.

When analyzing construction practice (on average), the following figures were obtained:

• Consumption for brick, sand concrete and porous concrete is 500 g per 1 sq. M. Costs can be reduced if impregnations that penetrate deeply into the material are used.
• First-class monolithic concretes are primed in the amount of 350 g per 1 sq m, provided that the pore size is medium.
• When there are few pores or the surface is already covered with paint, you can spend only 150-250 g of primer to cover 1 sq. M.

In order for adhesion to be fully ensured, the condition of the original wall surface must also be taken into account. If gaps are found during work or the base absorbs the finishing material very eagerly, it can be covered again, but only after the initial mixture has completely dried.

Determining exactly how much primers will have to spend is not so difficult. Its insignificant volume is weighed in a pallet and distributed over an area of ​​1 sq. m on walls and ceilings.

Such a test facilitates the calculation, allowing you to avoid both the purchase of unnecessary material and its sudden completion in the midst of work.

Home craftsmen and even experienced professionals are naturally interested in whether it is possible to deviate from the recommended figures, use a smaller amount of concrete contact. As practice shows, this is a big mistake: the cost of buying a primer is relatively small, and its lack worsens the quality of preparation. The created layer will be fragile - it can crack and exfoliate. The worst thing is that then it will not be possible to achieve a normal level of adhesion with the main finish.

Before you paint, plaster walls, or perform other preparatory processing, you first need to level the base as much as possible. And even if the characteristics of the composition allow it to be applied on an uneven base, it is better not to risk it and use a primer mixture. During the finishing of concrete in our time, the primer betokontakt is often used, which significantly improves many indicators of the concrete surface.

Peculiarities

It is often quite problematic to bond two different types of materials during finishing. Thanks to the primer, for example, betokontakt, the adhesion index is significantly increased 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 thanks to the sand, and the cement allows the mixture to adhere well to the walls.

The Knauf betokontakt 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.

Characteristics and use

You can use the Knauf primer without diluting it with water, just shake the canister and the mixture is ready for use. It is recommended for use for the following purposes:

• improving the adhesion of plaster or tiles to concrete walls;
• facilitating the plastering process;
• preventing the destruction of the painted layer on the plaster;
• hiding all cracks and seams;
• extending the life of the finishing material, which will not crumble prematurely.

The Knauf brand primer contains acrylic, due to which the mixture acquires sufficient resistance to moisture. The acrylic content does not adversely affect the quality of the base preparation, in many cases this becomes a significant advantage.

The manufacturer produces the following types of composition:

• coarse and fine fraction of the mixture;
• universal primer, as well as intended directly for external or internal use.

Modern manufacturing technology, as well as a recipe thought out by professional specialists, allows the soil to be unharmed and perform its functions for many decades. Just a few hours after the primer is applied to the surface, you can start finishing. Drying time is minimal, it depends on temperature and air humidity. If you ventilate the room, then the drying time will be much less than in a closed room. The soil has all the necessary certificates, these products fully comply with GOST and are of high quality.

The primer has a pink color, it impregnates walls and floors that cannot absorb leveling compounds or glue. This polymer dispersion primer can be used even when the old finishing material is not removed, but simply overlaid.

This primer from Knauf can be used for application not only on concrete, but also on:

• expanded polystyrene boards;
• ceramic tiles;
• drywall.

The solution that is laid on top of the soil dries evenly. Preliminary application of the primer mixture makes it possible to significantly reduce the consumption per 1 m2 of paint or plaster. This composition has antiseptic characteristics, thanks to it, pathological microflora, for example, fungi or mold, will not appear on the walls or on the floor. After drying, the primed areas become vapor-permeable, due to which the room will be ventilated, there will be air exchange.

It is necessary to prime at positive temperatures, however, when the mixture dries, it will retain its technical characteristics in the temperature range from -40 to +60 degrees. The acid-base balance of the composition is neutral, it does not contain toxic components, therefore it can be used even in places where there is practically no ventilation of the premises, the primer will not cause any harm to people living in the room. You can buy soil in containers of 5 and 20 kilograms. The mixture retains its original properties for a year and a half, if the tightness of the packaging is maintained.

Consumption

Many are interested in, what are the costs of a primer? The consumption of high-quality Knauf concrete contact per 1 m2 depends on several parameters. Experts say that the consumption of the mixture is determined by the absorption rate of the base, the type of surface, as well as its condition. The average soil consumption is:

• when applied to porous concrete, sand concrete and brick, the cost is 500 grams per square meter. When using impregnations that penetrate deep into the base, costs can be reduced;
• with an average porosity of monolithic concrete, the consumption is 350 grams per square meter;
• with a minimum number of pores, as well as in the case of application to a painted surface, the costs will be approximately 150-250 grams per square meter.

In order for adhesion to be maximum, it is necessary to take into account the condition of the base. If gaps begin to appear during priming, and also if the walls absorb the priming mixture very quickly, it is advisable to prime in two layers, the second layer can be applied only after the first layer has completely dried.

To understand how much primer will be spent in general, it is necessary to conduct a test. To do this, a small volume of the mixture is weighed and the betokontakt primer is distributed per m2 of the ceiling or wall. After that, the total number of square meters that need to be primed is calculated. Thanks to this sample, you can easily calculate how much material you need to buy.

Many are interested in whether it is worth saving concrete contact and using it less than recommended by the manufacturer? Experienced craftsmen have seen in practice that it is unacceptable to save soil. This often leads to a significant deterioration in the quality of the base preparation, as a result of which the surface will be fragile, adhesion to the finish will be insufficient. Finishing material may begin to delaminate, crack and crumble.

In addition, it is very important to consider how to properly dry certain materials. For example, if sand concrete is dried at the wrong temperature and it is not moistened in time, the walls will dry out, as a result of which even a sufficient layer of soil will not save the plastered layer from cracking and shedding. This will lead to additional costs and redoing the entire work. To avoid this, the manufacturer's recommendations must be strictly followed.

It is allowed to mix concrete contact with deeply penetrating soils, but then it must be used undiluted. If you apply the primer mixture with an airbrush, then the consumption will increase slightly. Knauf recommends waiting 12 hours after applying the primer for it to dry completely before applying the finishing material. Under normal temperature and humidity, the drying time is 3-4 hours.

If using hand tools such as a brush, roller or mop to apply betocontact, it must not be diluted with water. And when spraying mechanically, you can dilute the soil in a ratio of 2 to 1.