Often during construction or finishing works there is a need to glue together materials that are absolutely not suitable for this. Not so long ago, such a task presented a serious problem for builders and finishers. Today this problem can be solved quite simply. In order to combine, at first glance, incompatible products, a modern special primer is used, better known as concrete contact.
To create such a primer solution, materials such as cement, special adhesive mixtures, reinforcing additives, quartz sand. Betonokontakt primer is sold in stores in ready-made form, and can be used immediately after mixing. Sometimes this mixture is confused with a special glue; in fact, this is a mistaken opinion. The primer solution gives the treated surface properties that ensure reliable fixation of various materials.
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So, what is concrete contact for? A primer composition of this type is used to increase the adhesion of surfaces that do not absorb moisture well. Eg, concrete walls are known for being poorly accosted by almost anyone Decoration Materials. Finishers experienced particular problems when plastering concrete ceilings. The concrete contact primer has significantly facilitated the implementation of such work. Quite recently, craftsmen, so that the plastered surfaces did not crumble or peel, were forced to make PVA glue and fabric mesh the so-called bandage. This procedure was complex, lengthy and required certain skills. In contrast to this method, impregnation of walls with a primer is simple, but provides a more durable and high-quality finish. It is noteworthy that this primer is used not only for interior finishing work, but is also used when decorating buildings outside. The most striking example is its use in finishing the facade of a house. decorative plaster. Without such a solution, you risk facing the need for repairs in just a few months. Of course, during interior and exterior finishing work, the mixture consumption per 1 m2 will be different, and you should not forget about this. One of the remarkable properties of such a primer is the ability to treat surfaces made of different materials.
In other words, concrete contact can be used to impregnate walls made of wood, brick, concrete, etc. Of course, some manufacturers indicate that their mixture is intended for a specific building material. However, as practice shows, any soil can be used for processing different surfaces. Although, it is still better to use a solution to impregnate the material recommended by the manufacturer. In this case, the mixture consumption per 1 m2 and the quality of processing will be optimal. The use of such a primer mixture is not limited only to the treatment of walls during plastering. It is used both for preparing ceiling surfaces and for creating concrete screed. In addition, the mixture is used when working with drywall and even when installing self-leveling floors.
Important! When treating a wall with concrete contact, it is not necessary to eliminate the remains of the old decorative covering, it will ensure reliable fixation of materials in any case.
Properties of the primer solution
The ingredients included in the mixture ensure reliable adhesion of a wide variety of materials. The technical characteristics that made this mixture extremely popular among professional builders are as follows:
- Resistant to moisture. The primer contains elements with high waterproofing properties. As a result of using a primer, a film is formed on the surface being treated that does not allow moisture to pass through and ignores its effects.
- Safety for human health and environment. The solution does not contain ingredients that emit foreign odors. This option allows the primer solution to be used for both exterior and interior work.
- Lifetime. According to manufacturers, the primer can last at least 80 years. Unfortunately, no reliable information has yet been received to confirm or refute this statement.
- Drying speed. After applying concrete contact to the surface to be treated, you can work with it after a few hours.
Relatively low material consumption. The approximate norm is about 200-400 g per 1 m2. However, this is a very conditional statement. The answer to the question of how much solution is needed depends on the condition of the surface itself and the properties of the specific soil. Today there is a lot construction stores offer their customers similar primer mixtures. Their prices vary over a fairly wide range. However, when purchasing, you should not focus only on it. There is a stereotype that high cost guarantees quality, this is far from true. When buying a solution, pay attention to its specifications. In addition, try to ensure that all finishing materials you use are made by the same manufacturer.
There are several soils on the building materials market that enjoy the trust of buyers. It cannot be said that one of them is better and the other is worse; you need to purchase the one that most fully satisfies your needs.
Important! Their unique properties This type of primer mixture only retains its properties at temperatures above zero. Therefore, it is extremely important to organize the right conditions storing the solution, because after freezing it will become unusable.
The manufacturer of this primer recommends using it for interior finishing work. The composition of the mixture is optimal for pre-treatment poorly absorbent or non-absorbent surfaces before applying plaster to gypsum base. In other words, Knauf concrete contact is mainly used for treating concrete or cement surfaces.
However, its use is not limited to this; with the help of this primer, surfaces made of plasterboard, expanded polystyrene, aerated concrete and heat blocks are prepared. Concrete contact Knauf, like most similar solutions, can be used for interior decoration premises. This is a ready-made dispersion mixture, and a person with minimal skills can work with it. The consumption of primer directly depends on the method of its application and the material of the treated surface. For example, when mechanically applying the mixture to a wall, about 250-350 grams are used per 1 m2.
The technical characteristics of axton primer allow it to be used for treating even unprepared surfaces. They do not need to be sanded or subjected to thorough cleaning, although, of course, you should not forget about this.
The axton primer contains the following components:
- acrylic;
- marble chips;
- polymers (copolymers);
- quartz sand.
The consumption of such material is quite economical and amounts to 0.3 kg per 1 m2. You can work with a surface treated with this mixture within a few hours.
Betonokontakt Prospectors includes materials of the highest quality, including latex. Like similar mixtures, the solution can be used when preparing walls inside the house because... it will not cause harm to human health. The use of a primer strengthens and increases the adhesion of the treated surfaces. Betonokontakt Prospecti is used for treating surfaces such as old tiles, monolith, dense walls. In other words, the primer is designed to treat materials that are not capable of absorbing moisture. Betonokontakt Prospecti is extremely economical in consumption; only 200 grams of the mixture is enough per 1 m2. Concrete contact Prospector differs from similar materials in its drying speed. You can work with a surface impregnated with this primer after two hours. With other primer solutions you will have to wait at least four hours.
The use of Ceresit primer mixture is limited exclusively to internal work. Like its analogues, it increases the adhesion of materials that do not absorb moisture. It consists of minerals, aqueous dispersion, copolymers and special pigments. Particularly useful for processing monolithic concrete, on which, after priming, tile adhesive and plaster fit perfectly. Ceresite is a vapor-permeable solution that does not require preliminary preparation. This mixture is supplied to stores in containers of 5 and 15 liters. It contains no substances hazardous to human health. Primer consumption depends on the absorbency of the base and can reach 0.75 kg per 1 m2. Once applied to the base, this mixture dries in about 3 hours.
Regardless of the manufacturer, the technology for using primer solutions is practically the same. First of all, the surface to be treated must be cleaned of dust and dirt. In addition, experts recommend treating the walls with a regular primer before applying concrete contact. This ensures complete removal of dust and additionally binds the surface layer.
Important! The primer mixture is applied only to a dry surface. Therefore, if you used regular soil at the preliminary stage, wait until it dries completely.
The primer is applied to the wall using a paint brush, roller, paint brush or spatula. The solution should lie on the surface in a thin layer, without sagging or build-up. After treating the wall with concrete contact, you need to let it dry. How long a particular mixture dries is usually indicated on the packaging. However, the gap between priming the surface and its subsequent finishing should not be too long. After all, during this time, dust will fall on the wall again, and the longer the interval, the more dust there will be. In this case, soil consumption will naturally be higher than planned.
Summarizing
So, such a primer significantly facilitates finishing work, while saving time and money. Of course, you can use the sighting reticle the old fashioned way, and at first glance, this option will seem more profitable. However, this solution reduces the risk of entire pieces of plaster falling off, so the initial investment will be more than repaid. A surface impregnated with a special primer mixture is not affected by a hammer drill. When purchasing a solution, give preference to trusted manufacturers and do not hesitate to ask the seller for a certificate. Unfortunately, there are many fakes on the finishing materials market. Low-quality, cheap soil leads to unnecessary costs, and the stated technical characteristics do not always correspond to reality. The original primer mixture is easily recognizable by pink color and a pleasant smell. To avoid unpleasant incidents, try to purchase primer in specialized stores, but even in this case, check the expiration date and storage conditions.
In the process of repairs and construction work Concrete contact has to be used quite often. It is used when it is necessary to glue glass, wood, metal, tiles or tiles to concrete, as well as when preparing the surface for plastering or wallpapering.
This article discusses mixtures of the concrete contact type, studies their composition and technical characteristics, scope of application and consumption. We will also review the market regarding the most popular manufacturers of concrete contact mixtures.
Quality requirements and production technology for concrete contact mixtures are presented in regulatory document GOST No. 28196. In repair practice, concrete contact is used for the following purposes:
- for processing rough floors and ceilings before pouring screed;
- for impregnation of walls before plastering work;
- for treating drywall before gluing wallpaper;
- for ceilings before whitewashing.
Deep penetration concrete primer is intended for interior work; it can be used in a temperature range of 5-35 degrees and at normal humidity air. In conditions of sub-zero temperatures, not only the use, but also the storage of the mixture is not allowed, since in this case the quality of the applied coating is not ensured. After the primer has dried, the treated surface can be used at temperatures from -40 +50 0. However, some manufacturers add frost-resistant additives to the material, which allow the mixture to withstand 2-3 freezing cycles.
1.1 Features of using concrete contact (video)
1.2 Packaging, consumption, application technology
Concrete contact mixtures are sold in small buckets with a volume of 5-10 liters, tanks with a capacity of 30 liters, or in plastic 40-liter barrels. The standard shelf life is 12 months after the production date.
The consumption of the mixture primarily depends on the type of surface being treated - the more porous it is, the more primer will be required for coating. The category of porous materials includes brick and different types cellular concrete (foam concrete, aerated concrete), the primer consumption for their treatment will be 0.3-0.5 kg per 1m 2. If the surface does not have pores, as is the case with ceramic tiles or metal, then the consumption per 1 m2 will be about 0.15-0.2 kg.
The material consumption is also affected by the size of quartz sand fractions added to the mixture. Depending on this parameter, primers are divided into two types: with fractions of 0.3 mm (consumption for manual application is 0.2 kg/m2, when using a spray gun - 0.27 kg/m2) and with fractions of 0.6 mm - such concrete contact is applied in a thicker layer, therefore its consumption can reach up to 0.4 kg/m2.
Each manufacturer indicates the consumption of soil on the packaging, so by choosing the desired composition, calculating the required amount is extremely simple. Let's look at how to use concrete contact:
- the surface to be treated is cleaned of dirt, dust and oil stains;
- irregularities and cracks present on the surface are sealed with putty or leveling solution;
- Concrete contact is applied using a brush or roller in a layer of uniform thickness; machine application with a spray bottle is also possible (in this case, the liquid must be diluted - 50 grams of water per 1 kg of primer);
- If more than 2 days have passed between applying the primer and subsequent finishing, the coating must be reapplied.
The purchased composition must be thoroughly mixed before use, for which you can use a drill with a special attachment. After treatment, the coating dries within 12 hours at a temperature of 20 degrees. Finishing work should begin immediately after the primer has dried.
Sometimes it becomes necessary to wash concrete contact from the surface, but this is quite difficult to do after the material has hardened. To wash the primer, cover it with a damp cloth soaked in water dissolved washing powder(it is advisable to use powder with active oxygen), cover the rag with oilcloth and wait 10-12 hours. After time, the stain can be removed with any abrasive. If the stain does not fade, then the only remaining method is mechanical cleaning using a grinder or grinder.
The market offers a fairly wide range of concrete contact primers from both domestic and foreign manufacturers. Let's figure out which primer is best to choose.
Among domestic concrete contacts, we note the following manufacturers:
- "Plitonite".
- "Prospectors"
- "Bolars"
- "Basic."
The most popular is Prospector concrete contact. The composition is sold in plastic buckets volume 3, 5 and 20 kg. Material consumption is 0.2-0.3 kg/m2, drying time is 2-3 hours (in the temperature range of 15-25 degrees). Betonokontakt Prospectors has an affordable price, so the price of a 20 kg bucket is 1500 rubles, a 5 kg container is 420 rubles.
The concrete contact Osnovit T55 (20 kg) has also proven itself well. In addition to concrete surfaces, this primer can be applied to brick, plaster and tile walls. This composition contains expanded clay fractions of 0.6 mm, which causes its increased consumption - 0.45-0.5 kg/m2. However, larger expanded clay aggregate provides increased surface adhesion, which makes Osnovit more effective means than Prospectors. Another advantage of this composition is that the drying time is reduced to 1.5-2 hours.
If you need a primer with anti-frost modifiers, then it is best to choose Bolars concrete contact. The mixture is supplied in buckets of 2.5, 5 and 10 kg, the price of a 10 kg bucket is 600 rubles. Technical characteristics of concrete contact primer “Bolars”:
- frost resistance - 5 cycles;
- operating temperature range - from -40 to +60 0;
- drying time - 10 hours;
- consumption - 0.25-0.3 kg/m 2.
Popular concrete contacts from foreign manufacturers are the compositions of the companies Glims, Ceresit, Feidal. If you have an unlimited budget, you should use Ceresit CT19 - this is the highest quality mixture, the cost of which is 1200 rubles per 15 kg bucket. Ceresit CT19 has a consumption of 0.5 kg/m 3, this primer is used as an adhesive layer for the subsequent application of plasters, putties, adhesives and paints.
One of the most affordable imported concrete contacts is Glims (price 850 rubles per 15 kg). This is a reliable primer that provides adhesion of 0.7 MPa, its only drawback is long time drying - 24 hours from the moment of application.
Concrete contact Feidal is a German-made mixture, distinctive feature which is the absence of solvents in the composition. This increases the drying time of the primer, but its final strength becomes significantly higher. Material consumption is 0.3-0.35 kg/m2. Feidal is sold in buckets of 4, 7, 14 and 20 kg. The cost of a 20-kilogram bucket is 1,500 rubles.
Quite often during the renovation process it is necessary to combine some materials. But due to their properties and components, they adhere very poorly to the surface of the walls. For example, it is quite difficult to attach tiles to metal or wood. In this case, we recommend the use of concrete contact. In this article we will talk about its technical characteristics and provide instructions for correct use.
Specifications
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. Average term service is approximately sixty years;
- the consumption is not too high and on average you will need 200-300 grams of mixture to process one square meter walls.
Thanks to these technical characteristics, concrete contact has gained wide popularity among both professionals and beginners in the construction business.
Where can it be applied?
Let's try to answer the question, what is concrete contact for? So, the main property is to increase the adhesion rate of wall surfaces with poor moisture absorption. Thus, concrete tends to repel moisture, and therefore almost any material does not stick well to it. In this case, you can use concrete contact and, due to its properties and technical characteristics, increase the adhesion rate.
Previously, professionals used a special fastening for this purpose, which was called a bandage. This made it possible to safely plaster concrete walls. But now, with the advent of concrete contact, the need to install such a heavy fastening has disappeared. After all, the effect of using the solution is much stronger, and the method of application is much simpler.
This material can be used for both internal and external walls. So, it is used for finishing buildings before applying facade plaster, which allows the coating to adhere perfectly. This primer can handle almost any surface, which is also a definite advantage. It can be used to process walls made of wood, metal and other materials. Using concrete contact, you can be sure that any mixture will last on the wall for a long time. The method of application is quite simple, but we will talk about this below.
Tools
In order for the work to be done efficiently, we recommend that you do not skimp on tools and materials, because it depends on them how many years the wall repair will last you. To use concrete contact you will need:
- roller or brush for application;
- a container to pour out and, if necessary, dilute the solution;
- a table or stepladder to reach the ceiling;
- Remedies;
- concrete contact.
As you can see, the set of tools is not very large, so you won’t have to spend much. The main thing is to try to choose a high-quality mixture, be sure to check the expiration date. If you have any problems or questions, be sure to consult with the seller, he will be able to tell you which type of solution is best for use.
Application instructions
The method of using concrete contact does not require special skills. The first step is to remove dirt, dust and old coating from the surface of the walls or ceiling. Before application, we recommend treating the surface with an ordinary primer to ensure that you get rid of dust and ensure the connection of the surface layer with the base solution. You will need to let the wall dry; applying concrete contact to a damp wall is highly not recommended.
Next you need to apply it to the wall. To do this, you can use a roller, brush or spatula. We cover the wall with a thin layer and try to distribute it evenly. In the corners of the wall or other hard to reach place The priority tool is the brush.
After application, you need to give it time to dry. After an hour, it may seem that the solution is completely ready and you can continue, but this is a misleading idea. If you run a spatula along the wall, the concrete contact will come off quite easily. This should not happen if it dries completely; on average, you will need to wait about two to three hours to continue working. Drying time depends on external factors: temperature, humidity indicator and other things.
We recommend not to delay the subsequent treatment of the wall surface, since over time the level of adhesion decreases due to the dust that forms on the wall. If a couple of days have passed after application, it is better to apply a regular primer to the wall to remove dust and dirt.
As you can see, the method of application is quite simple and does not require any special skills. Also, be sure to read the instructions on the package, there may be useful tips for wall treatment.
Conclusion
As you can see, the concrete contact is quite useful remedy for processing almost any type of wall. It will not only increase the level of adhesion, but also strengthen the base and provide protection against the formation of mold, mildew and other harmful bacteria. Its use on walls is quite simple and does not require large financial investments or experience in the construction craft. Even a beginner can handle the job, the main thing is to apply quality tools and materials. Also try to adhere to the rules and instructions provided in the article and good result won't keep you waiting long.
To understand in more detail how to use concrete contact for walls, we recommend watching the following video:
In the process of finishing work and application to surfaces various coatings There is always the possibility of subsequent exfoliation of the material. Concrete contact primer is an excellent tool in the fight against such adverse consequences.
Concrete contact increases the adhesive properties of the material used, which is facilitated by its composition:
- polymers;
- cement;
- specialized additives;
- sand.
In this article, we tried to present material that can help you decide on the difficult choice of concrete contact mixture, as well as answer two main questions: which one should you choose and how much of it may be required. We invite you to familiarize yourself with basic information about concrete contact, as well as consider samples from the most advanced manufacturers.
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This material boasts excellent functional qualities:
- Very quick drying: to carry out further finishing work, you should wait literally a few hours from the moment the mixture is applied;
- moisture resistance – concrete contact primer demonstrates waterproofing properties, creating a waterproof film when used. It is important to consider that using the mixture for floor screed does not require moisture resistance;
- economical material consumption per m2;
- durability and reliability - according to the manufacturers, the composition of the material allows it to serve faithfully for about eight decades.
What explains the widespread use of concrete contact mixtures - the above characteristics of the primer speak for themselves.
Why do you need concrete contact?
Its primary function is to increase the level of adhesion of a surface that poorly absorbs moisture. A good example Monolithic concrete will serve as an explanation - water very reluctantly permeates its structure, which is why any mixture stubbornly refuses to attach to it. Therefore, the use of concrete contact for plastering concrete surfaces is the most logical solution for any builder. It is simply impossible to find a product that is better suited for preparing walls and ceilings.
It is noteworthy that previously, in the case of peeling plaster, repair workers often used a special bandage made of ordinary PVA glue and textile mesh. They were glued directly to the concrete, after which a layer of plaster was applied to them.
Today, this procedure is considered too labor-intensive and outdated, especially compared to the use of concrete contact. The primer mixture works on the same principle as the bandage, but its use is simpler, more effective, and quality assured. The calculation of consumption is carried out in a standard way - per m 2.
What is the best way to apply concrete contact mixture?
The good thing about using a primer is that its composition does not require the use of special devices. Everything is extremely simple:
- Before further finishing, the working area should be thoroughly cleaned of loose particles, dust lumps and contaminants. It also doesn’t hurt to walk over the walls with regular primer before covering the surface with a primer: it helps to completely eliminate dust clots and adhere the surface layer on the walls and ceilings;
- the treated surface must be completely dry, since the use of concrete contact does not allow the presence of moisture - it simply will not stick;
- now everything becomes even simpler: you need to take a brush, a roller (if desired, you can also use a spatula), scoop up the primer with it and cover the surface to be treated with an even thin layer. To make the process as productive as possible, it is better to give preference to a brush or a brush with wide bristles;
- After applying the concrete contact mixture, you need to wait until it hardens completely. Do not be deceived: you may mistakenly assume that the layer has dried after an hour, and continue finishing work. This will turn out to be a serious mistake - run a regular spatula over the layer and you will make sure that the applied primer does not adhere to the surface and immediately lags behind it. Complete hardening of the mixture occurs after at least two hours, but sometimes more. How quickly it dries and what its consumption per m2 will be depends on a number of factors: air humidity in the room, set temperature. But even under the most unfavorable conditions, a surface coated with primer in the evening will certainly be completely dry in the morning;
- material consumption depends on the composition of a particular mixture.
Composition: the concrete contact mixture is based on a specific water dispersion base containing a quartz type of sand from fine fractions. The peculiarity of the composition makes it possible to increase the reliability of fixation of the concrete contact mixture on the surface.
Application:
- The main purpose of the primer is improved quality of fixation of smooth surfaces for further finishing work. It is most often used before covering substrates with gypsum, lime, lime-cement mixture, plaster, tile adhesive, etc. It can also be used to cover monolithic concrete, concrete blocks and other smooth surfaces;
- The primer should be applied undiluted or mixed with plain water (the proportion of concrete contact and water is 2/1).
Operating principle: Knauf concrete contact promotes the formation of a rough surface texture and increases the reliability of adhesion quality.
Preferred surfaces: The dispersion in question is especially suitable for treating surfaces that have a dense texture and poor moisture absorption capacity. These include monolithic concrete, floors, massive ceilings, and concrete blocks.
Technical characteristics: material consumption per 1 m 2 of base is approximately 0.35 kg (calculated when applied in one layer). Dries in 3 to 4 hours.
Betonokontakt Prospectors - a primer that includes latex and other special additives of the High Quality. It is used to increase the strength of the treated base, rid it of dust and fully prepare it for further finishing work.
Used to treat surfaces that do not have moisture absorption properties:
- monolithic concrete;
- massive walls
- dilapidated tiles;
- surfaces made of dense minerals;
- It is also widely used before leveling bases with plaster, facing work, and puttying.
Betonokontakt Prospector is effective for increasing the adhesive qualities of the base. The material dries very quickly, which allows further work to be done within 2 hours.
Technical characteristics: Prospector concrete contact has a very economical consumption (spent in the amount of 0.2 kg per m 2). It is convenient to use, as it does not require any preparation and must be used in its original form.
Workflow algorithm
- To start treating the base with the mixture, you need to have a roller with you for painting works a (size about 250 mm) or a fly brush (size about 100 mm). But you can also use a spray gun for these purposes. The paint roller should be completely dipped into the primer, and then applied evenly to the base, avoiding tears. The material allows the application of additional layers. Keep in mind that applying the next layer requires the previous one to dry completely;
- Be sure to stir the primer to a uniform consistency before using it. At the end of work, the devices should be rinsed with plain water.
Ceresit
The Ceresit primer contains minerals and a water-dispersion base, which also contains special pigments and copolymers. Used to cover smooth vertical substrates with poor moisture absorption ability. It works well when processing monolithic concrete for subsequent application of plaster and tile adhesive. The material is suitable only for interior work.
Ceresit is effective in increasing the adhesive properties of treated substrates. It is vapor-tight and does not require preparation before use. It does not contain toxic substances or solvents, which makes it absolutely safe.
To start treating the bases with the mixture, you need to have a fly brush (size about 100 mm). The paint brush should be completely dipped into this primer, then applied evenly to the base, avoiding tearing. The material allows the application of additional layers. Applying the next layer requires the previous one to dry completely.
Technical parameters of the mixture:
- the consumption will be approximately 0.4–0.8 ml per m2;
- how long does it take to dry: up to 4 hours;
- dries completely within 24 hours.
After finishing work, wash the devices in plain water. The primer should not be diluted with water and should not be applied using a roller.
It is a high-quality material presented in the form of a dry mixture. Craftsmen often resort to using it when working with concrete contact. It is excellent for finishing and construction work.
Axton mixtures include:
- acrylic;
- quartz sand;
- marble chips;
- polymers and copolymers.
The specificity of the composition allows the use of these mixtures even on unpolished and uncleaned substrates. The consumption of the primer mixture is extremely economical, amounting to approximately 0.3 kg per m 2. Complete drying of the material requires several hours.
This type of building material is a polymer dispersion; the composition contains pure quartz sand, resistant to alkalis. What is concrete contact for? - m material is used to provide high level adhesion of the surface and the substance applied to it.
Betonokontakt technical characteristics
- The maximum size of particles included in the fine-grained mixture is 0.3 mm.
- The maximum size of particles included in the medium-grained mixture is 0.6 mm.
- Acceptable temperature values when applying primer are from +5 °C to +30 °C.
- Acceptable temperature values during operation are from -40 °C to +60 °C.
- Color ready mixture- light pink.
- The average pH of the mixture is from 8.0 to 9.0.
- Approximate drying time for one layer is 3 hours.
- The average consumption of concrete contact per m² is 300 g of mixture (depending on the type of primer and surface used).
- Frost resistance - the applied and completely dried mixture can withstand 5 cycles of freezing below the permissible value.
- The consistency of the finished mixture is homogeneous (without inclusions of large particles).
- Material safety - environmentally friendly product.
It is advisable to use concrete contact:
When conducting repair work concrete contact primer is used in the following cases:
Excessive surface smoothness
If the surface on which you need to apply some mixture is too smooth, then there is a high risk that it will simply fall off.
To ensure good bonding, concrete contact primer is applied to a smooth wall (ceiling), which, after drying, turns into a thin and rough film on the surface.