Primer for reinforced concrete surfaces. Primer on concrete for internal works. Acrylic primer for concrete

Before proceeding with the finishing of the internal and external surfaces of concrete buildings, it is necessary to prime them, for which various types of primers are used. Their task is to strengthen the top layer of the base, protect it from negative atmospheric influences. The price of the material is low, but it does a very necessary job.

Ready-to-use acrylic-based primer for concrete outdoors

Priming material has the following advantages:

• properties of the processed surface are completely preserved;
• the service life of the base is increased;
• promotes better adhesion of finishing materials and the base during repairs;
• acts as an insulator, preventing incompatible materials from coming into contact.

Tip: you can use some types of primers as a material for finishing surfaces.

Waterproofing primer for concrete floor Aquastop

Foundation preparation

A surface made of good quality concrete has a fine monolithic structure, i.e. it is almost smooth (for example, concrete floor slabs and prefabricated houses).

Adhesives and putties do not fit well on such a base, they have nothing to catch on:

• the wallpaper pasted on it peels off;
• putty peels off;
• the plaster is cracking.

Tip: if during the preparation of the premises you need to dismantle concrete structures, there is a service - cutting reinforced concrete with diamond wheels using special tools.

If the decoration of the premises is carried out by experienced craftsmen, even before the start of the repair, on unaltered walls, they determine the properties of the surfaces.

A lot of damage to the old finish indicates that the walls were not processed, no preparatory work was carried out, including cleaning and priming the surfaces.

If the walls are to be painted, before that they must also be prepared with a primer.

Mineral primer for aerated concrete

Tip: to protect surfaces from various microorganisms, use a primer with an antiseptic concrete surfaces.
It is used for processing the external walls of buildings and in rooms with a high level of humidity.

Primer application

Use a roller or brush to apply the material.

• due to its properties, the surface will not absorb more than the indicated volume of primer, its excess will simply dry out without bringing any benefit;
• applied in a smaller amount will also be useless, it will not be able to penetrate the base and will not strengthen it.

In the photo - the use of a roller for applying soil

Tip: Complete all foundation and wall work, including diamond drilling in concrete, before applying primer.

Primer types

Primers are intended for processing of external and internal surfaces of buildings. Material for external work is also used indoors. But, due to the fact that such compositions contain components dangerous for breathing, when working with them, the rooms must be thoroughly ventilated.

There are the following types of primers:

• with antiseptic: protect against mold and fungus.

Depending on the type of surface, primers are divided into:

• material for a smooth surface (perform a waterproofing function, used for painting or plastering);

PS-Grunt - concrete primer for floors

• for cellular concrete (have an increased viscosity, contain silicate fillers that fill the pores). They are well absorbed by concrete, but practically do not strengthen it;
• concrete contact (increases the adhesion of surfaces that do not absorb moisture well).

Usually, the instructions on the packaging of the primer indicate which surface it is intended for.

When choosing soil:

Tip: remember that the composition does not strengthen the concrete as a whole, so it does not need to be added to the mortar.

It penetrates a maximum of 70 mm (this is the indicator for the most expensive imported soils) into concrete, creating a surface protective layer. This material, just like the bumper of a car, takes the blow, protecting the base.

Surface preparation with Betonkontakt

A primed concrete base will last longer and better. By analogy: a special-purpose paint protects the metal from corrosion, but for this, when cooking the metal, it is not added to its composition, the chemical processes are different. So it is with the primer: from the fact that it was added to the concrete solution, it will not become more plastic and stronger, special additives are used for this.

Tip: the thoughtless use of soil in the composition of concrete can reduce its strength characteristics.

Only with a special construction or engineering education behind them, it is possible to introduce special concentrates into the concrete solution, which enhance its strength.

Priming concrete surfaces makes it possible to use them for further finishing work, and also allows you to strengthen them and protect them from fungus. Before purchasing the necessary material, find out the structure of your base, so you can prepare it in the best possible way. The video in this article will help you find more information on this topic.

Interior primer Osnovit INTECONT LP 50 is used for dedusting and strengthening previously plastered surfaces, gypsum bases, GVL, GKL, cement and concrete bases. The primer prepares the surface for the subsequent application of the finishing material - plaster, putty, paints and varnishes, self-leveling floors, tile adhesive.

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Founding LP 53 "DIPKONT" Deep penetrating primer (10 l)

Primer Osnovit DIPKONT LP 53 has a wide range of applications. This type of primer is applied during facade work, before plastering, puttying the surface, before installing a self-leveling floor. The price of T-53 primer in our store will pleasantly surprise you!

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Will base LP 55 "BETTOKONT" Concrete contact primer (20 kg)

Soil Osnovit BETTOCONT LP 55 is an aqueous dispersion, which consists of a styrene-acrylic copolymer, fillers and special modifying additives that improve the quality of the building material. There are no harmful components in the T-55 primer. Soil Osnovit BETTOCONT has passed all the necessary checks and complies with the hygienic and sanitary standards of the Russian Federation.

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Weber Vetonit MD 16 Acrylic dispersion (10 l)

Primer for pre-preparation of substrates before applying floor smoothers, screeds, plasters and fillers: improves adhesion to the substrate before applying smoothers and self-leveling floors, prevents the formation of air bubbles in the freshly laid leveler, prevents too rapid absorption of water from the leveler and screed into the base .

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Oscar interior primer 10 l

Primer «OSCAR» It is designed for reliable strengthening of various mineral substrates and leveling of highly or unevenly absorbent surfaces, such as plasters, gypsum boards, etc. The special formula of OSCAR primer allows it to quickly and deeply penetrate the surface.

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Ecorum Acrylic deep penetration primer (10 l)

Colorless. Penetrates deep into the surface, strengthens porous, crumbling and slightly chalked substrates. Improves adhesion, reduces paint consumption, equalizes the absorbency of the base, allows the back surface to "breathe", does not contain solvents, has strong antibacterial properties, prevents the appearance of fungal formations.

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Knauf "Tiefengrund" Soil-universal (10 l)

Tiefengrund Deep Primer is a quick-drying, colourless, transparent, solvent-free, ready-to-use primer for pre-treatment of substrates to improve adhesion (adhesion of the coating to the substrate) and strengthen the surface when laying ceramic tiles, painting, wallpapering and puttying

When performing repair or construction work, various mixtures are used to strengthen the surface and increase its adhesion to finishing materials.

A primer for a concrete floor, with the right selection, will increase the strength of the base and ensure good adhesion with mortars and finishing materials.

The use of such a solution is a prerequisite for the work and allows you to increase the service life several times.

The primer refers to liquid building materials designed to prepare the base for further work by strengthening its surface and increasing adhesion with components of various compositions (adhesion).

Dust buildup on a concrete slab is common. In addition, the presence of pores in the top layer of concrete allows the material to accumulate moisture or other more aggressive substances.

They contribute to the destruction of the structure of concrete, the appearance of microcracks on it and a decrease in wear resistance.

The priming technology is used on various objects, ranging from large construction sites to or rooms in residential buildings.

Treatment of concrete surfaces with such compositions will protect them from moisture penetration, the appearance of fungus or mold.

With further finishing work, the treated base will improve the penetration of paint or adhesive for laying floor tiles.

A high-quality primer will prevent premature peeling of protective or decorative materials.

For high-quality performance of work, it is necessary to perform a set of works that will allow you to prepare the surface for finishing work as much as possible:

Clean the concrete floor from debris and dust.

If cracks are found, it must be repaired.

Check the floor for bituminous or grease stains and, if present, clean or remove with appropriate solvents.

If possible, you can remove the remaining dust with a vacuum cleaner.

Watch a video on the topic:

The prepared base should be as clean and smooth as possible, which will ensure the best penetration of the primer solution and reduce its consumption.

Types of concrete bases

There are several types of concrete bases for which it is recommended to use different primers.

Monolithic concrete base. It is characterized by a high density of the outer layer, which is often covered with a shiny film, such a base does not absorb moisture well and without preparation it is useless to apply any solution.

Preparation of this type of substrate requires the use of a primer for slightly absorbent surfaces or thorough sanding.

Concrete screed. Such a surface refers to light screeds, in which expanded clay or similar additives are allowed.

For such a floor, a deep penetration primer will be most suitable, which is able to strengthen the treated layer as much as possible, penetrating quite deep into the pores of concrete.

Types and types of solutions. The primer for the concrete floor according to the method of application is divided into two types:

Universal (use for internal and external works).

Specialized (only for external or only for internal work).

Universal primers, having a wide scope, are inferior in quality to specialized mixtures.

To work on a concrete surface, several types of solutions are used, selected depending on the purpose and requirements for the coating:

• Strengthening primers;
• acrylic blends;
• Polyurethane mixtures;
• epoxy mixtures.

Strengthening primers are primers for slightly absorbent surfaces, and the presence of quartz sand provides the roughness that is necessary for the best application of a self-leveling floor or decorative coating.

The layer created by this primer forms a waterproof film and provides additional waterproofing.

Acrylic, have received the highest use due to their low cost, and lack of smell. Such mixtures dry within 4 hours and are used to strengthen various surfaces.

In most cases, their composition includes fungicidal additives that protect against the appearance of mold or fungus.

Polyurethane are used for preparation and have a high degree of protection against chemicals.

Drying time is about 12 hours, after which you can use polyurethane paint on concrete.

Epoxy paints are highly resistant to detergents and are used in the further use of epoxy paint.

Such mixtures dry within an hour, forming a strong film.

Application technology

A primer is commercially available in the form of a ready-made mortar or a dry mixture; in this case, the preparation guide is on the package.

The dry mixture should be prepared exactly following the instructions, excessive dilution with water can disrupt the properties of the solution.

Also, do not reduce the proportion of water in this case, it is possible to peel off the applied layer, which will lead to the need to start the whole process again.

The work on priming concrete surfaces should be carried out at a positive temperature and the humidity mixture recommended by the manufacturer.

With a significant increase in humidity, the applied solution may foam, which will lead to its unsuitability.

The primer should be applied with a roller or spray, and in places where this method is not effective, a brush should be used.

Typically, such a coating is applied in one or two layers, depending on the density of the surface.

The substrate must be primed before applying any finishing coats. This is especially important when performing outdoor work, since open structures are more susceptible to wear. We will tell you why you need a deep penetration primer for outdoor work and how it should be applied.

Priming compositions for outdoor work

Purpose

The soil performs several functions:

• First of all, the priming mixture penetrates into small pores and capillaries, fills all kinds of voids and cracks that are contained in the structure of any material. The fillers and pigments included in the mixture cement the cracks and plug the pores, thereby strengthening the surface;
• By filling the pores, the absorbency of the base is reduced, and the consumption of expensive paints or putties is also reduced. In addition, the use of a primer evens out the hygroscopicity index over the entire surface, and the paint lays down and absorbs evenly, which affects the color rendering and the thickness of the coating layer;
• A primer is especially important for mineral substrates such as brick,. These materials only seem to be monolithic, in fact they consist of the smallest particles, which eventually exfoliate in the form of dust. The soil sticks together these particles and prevents the surface from crumbling, strengthens it and makes it monolithic;
• An equally important function of the primer is to increase the adhesion of the coating to the base. Not all coatings and putties adhere well to surfaces, especially for metals, plastics, smooth stone or concrete. Here, the primer plays the role of a kind of glue that holds the coating and prevents it from peeling off;
• Finally, the soil performs a protective function: it may include antiseptics, fungicides and fire retardants, which protect the base material from decay, fungus, fire and other undesirable environmental influences.

Important! As you can see, the benefits of using primers can hardly be overestimated. At the same time, the price of the material is relatively low, so abandoning the primer is just stupid.

Varieties

When choosing materials for priming, several important parameters should be considered:

1. The composition of the paint or plaster coating that will be applied to the surface of the base. There are universal compositions, but more often there are materials designed for specific types of coatings: for oil or acrylic paints, for plaster or etc.;
2. Base material. Depending on what material the composition will be applied to, a primer for concrete for outdoor work or a primer for metal for outdoor work, etc. is selected;
3. Application area. The soil is selected depending on where it will be used: in a dry or damp room, inside or outside, in a cold or warm climate. We are talking about materials for outdoor use, so we will focus on them below.

Priming mixtures for external use should differ in a set of certain qualities:

• The mixture must be weather resistant. This means that it will calmly endure the effects of moisture and precipitation, withstand significant temperature changes, including negative values, withstand freeze / thaw cycles and are not afraid of solar radiation;
• The composition should contain preparations that reduce the likelihood of contamination of the material by bacteria and fungal spores. These are various antiseptics and fungicides;
• For the treatment of metals, primers are used, which include rust inhibitors, antioxidants and other chemicals that reduce the corrosion of metals;
• To work with wood and some types of mineral materials, water repellents are used;
• Also, in the composition of external soils, an increased content of film-forming and adhesive components is observed for more reliable strengthening of the base.

Important! When choosing the right material, consider as many of these factors as possible. It is also advisable to select a primer along with paint or putty, as many manufacturers create complex products that are as well compatible with each other and with the base on which the finish is planned to be applied.

Application

The soil is applied by hand, and to simplify this task, we have compiled a step-by-step instruction:

1. The outer wall should be free of dust and dirt. It is best to wash it with a pressure jet and wait until it dries completely;

1. Primer needs to be diluted according to the manufacturer's recommendations. To do this, pour the concentrate from the canister into the bucket and add the required amount of water in accordance with the recipe specified in the instructions;

Before starting work related to finishing the surfaces of buildings constructed of concrete, it is required to prime them, for which various types of primers are used.

Primer for concrete and plaster: purpose

The main purpose of using a primer is to strengthen the base, as well as protect it from various negative atmospheric influences. The cost of this material is low, despite the fact that it performs an important function.

Benefits of using a primer

As the positive aspects of the primer material, according to user reviews, the following can be distinguished:

• the property of the treated surface remains unchanged;
• the service life of the base is extended;
• during the repair, the base and finishing materials are fixed stronger;
• The concrete primer acts as an insulator, eliminating the possibility of contact between materials that are not suitable for each other.

Foundation preparation

Surfaces made with concrete of the appropriate quality are characterized by a finely dispersed structure, thanks to which they are perfectly smooth (for example, ceilings made of concrete slabs and prefabricated houses). However, it should be noted that on such a basis, glue and putty simply have nothing to catch on, they are poorly placed.

• wallpaper quickly begins to peel off;
• putty is peeling;
• cracks appear on the plaster.

If the finishing is carried out by highly qualified specialists, then even before the start of repair work, they determine the characteristics of the surfaces.

If there is a large amount of various kinds of damage on the previous finish, then this indicates that the walls have not undergone the necessary processing, preliminary preparatory work has not been carried out, which includes cleaning the surface and priming on concrete.

Surface cleaning steps and primer application

1. Before applying the primer to the base, it is recommended to properly clean it with your own hands from the previous coating, where, most likely, unnecessary dust has accumulated.

2. All existing defects (cracks, irregularities) on the surface must be completely eliminated.

4. After completing the above steps, the base should be leveled.

Recommendations: to protect the surface from microorganisms that can cause harm, you should use a primer that contains an antiseptic. It is used in the processing of external walls of buildings, as well as in rooms with a high level of moisture.

Primer application

When applying this material, you must use a roller or brush.

• Due to its properties, the surface is not able to absorb the amount of primer, more than the indicated volume. Excess material will simply dry up, without bringing any benefit.
• If you apply a primer less than the required amount, then this will also not be of any use, since it will not penetrate into the base, respectively, will not be able to strengthen it.

Varieties of primer

The material is intended for processing internal and external surfaces. An outdoor concrete primer can be used indoors just as well. However, due to the fact that the composition includes components that are hazardous to the respiratory system, after its use it is necessary to properly ventilate the rooms.

There are the following varieties:

• Primer for concrete strengthening, with deep penetration.
• Textured, which include fillers. Are applied at the subsequent work with surfaces (for example, on concrete).
• Insulating. They protect against the adverse effects of climatic conditions, chemicals, mechanical influences (these include silicone, polyurethane and epoxy primers for concrete).
• Primers containing antiseptics: protect against mold and mildew.

Depending on the type of surface, primers are divided into:

• Primers designed for a smooth surface (they perform the function of protecting against moisture, they are used for painting or plastering).
• Primers designed for cellular concrete (characterized by good viscosity, they include silicate fillers designed to fill the pores). They are well absorbed, but weakly strengthen the concrete.

The instructions on the packaging of the material indicate which surface the primer for concrete is intended for - for outdoor use or for indoor use.

When choosing soil:

1. It is necessary to identify what the composition is for (for or painting, for waterproofing).

2. You should know what material the base is made of (fresh concrete or old, dense or cellular). Based on this, you should choose a primer with the appropriate characteristics.

The maximum penetration depth is 70 mm, which creates a protective layer. This material, like a bumper, takes all the impact on itself, performing the function of protecting the base.

The base treated with a primer will retain its properties much longer and better. But if this material is added to the solution, it will not become stronger without the use of additives specially designed for this purpose.

In order to add special components to the concrete solution that can enhance its strength, it is necessary to have a special construction or engineering education.

Conclusion

Priming surfaces made of concrete allows them to be used for subsequent finishing work, and also helps to strengthen them, protects them from fungus. Before acquiring the right material, it is necessary to find out the structure of the base, which will help to prepare it in the best way.

A primer for concrete, the price of which is from 450 rubles, is a high-quality and environmentally friendly material without a specific smell. It is sold in various containers and has various packaging.