What is the consumption of the primer per 1 m2 of the wall?

Painting various surfaces is one of the key points of any renovation. Primer mixes provide an even coating and allow the paint to last longer, therefore it is very important to observe all the nuances of applying the primer. And the most important thing is the correct calculation of the primer consumption. If you are not a professional, this article will help you figure it out.

A primer is a special bonding material that is applied to work surfaces. It penetrates deeply into the base, fixes it, one might say, glues the coated work surface (adhesive property).

The primer is applied before subsequent repair work., such as putty, plaster, painting, wallpapering, pouring the self-leveling floor. Thanks to this, paint, plaster, tiles, wallpaper are firmly held on the plane. Before you start priming, you need to decide for what purposes it is needed, what tasks need to be performed, and only after that you can choose the composition and type depending on the tasks.

The types of soil are very diverse, they have different characteristics, qualities and, accordingly, purpose. For example, insulating materials create a thin layer between the work surface and the subsequent layer. Anti-corrosion inhibit surface oxidation. Antiseptic and antifungal agents contain special antibacterial and antimycotic additives, which, in turn, prevent the development of mold and mildew.

The concrete-contact primers contain elements that create a rough layer. This contributes to better adhesion of dense and smooth work surfaces (eg concrete) and finishing materials. There is also a universal type - this is a composition with deep penetration, it creates an excellent protective layer. There are also specific types, for example, with the function of electrical conductivity, they are used to create special electrically conductive layers, if it is necessary to glue any electrically conductive material.

There is also a bituminous primer or, as it is also called, a primer. It is used where good waterproofing, good adhesion and dust control are required. Such characteristics are necessary, for example, for roof repairs. They are mainly suitable for outdoor use, but some manufacturers produce water-based primers that are solvent-free and can be used for indoor repairs. There are also dry or liquid formulations, and they can also have a different consistency.

Primers differ in:

• composition;
• the degree of penetration;
• appointment;
• place of use;
• properties.

And they can consist of natural and synthetic components. The composition also depends on what surface they are intended for.

There are the following types of surfaces:

• wooden;
• metal;

• concrete;
• plaster;
• universal.

In terms of composition, they are divided into:

• acrylic (suitable for drywall consumption);
• mineral;
• alkyd;

• glyphthalic;
• phosphate;

• quartz;
• bituminous;
• others.

According to the degree of penetration, it can be divided into:

• ordinary;
• deep penetration.

According to the place of use, they are divided into:

• external wall primers;
• for interior walls;
• universal.

If classified by properties, then here we can distinguish:

• insulating;
• moisture resistant;
• antiseptic;

• anti-corrosion;
• antifungal;

• fireproof;
• other types.

Material consumption per 1 square meter of wall depends on the type of surface on which it is applied. Consumption will be different for different walls, floors, ceilings, etc. and, accordingly, will depend on the primer itself. It is necessary to understand that one of the main criteria for choosing a product will be the surface structure. Porous ones require mixtures with a high degree of adhesiveness (adhesion) and a high degree of penetration.

When applying primer, consider how many layers will need to be applied. Usually 2-3 coats are applied. If the wall has a medium porosity, then a universal primer is suitable for it. It is also necessary to take into account the future facing material. Thus, it will be possible to calculate the required amount of the composition.

First of all, it is necessary, of course, to be guided by the manufacturer's instructions. It usually indicates for which surfaces this composition is suitable, how it should be applied and what the consumption will be.

To determine the amount of soil, the following factors must be taken into account:

• surface types;
• manufacturer's requirement;
• type of building materials;
• application technique (roller or spray);
• the number of layers required;

On average, soil consumption per 1 sq. m. (in liters) for various primers looks like this:

Zinc-rich polyurethane anti-corrosion primer. These products are more professional than amateur and are used as protection against corrosion in an environment aggressive to metal, mainly in various industrial enterprises. The coating is resistant to various oil products, to polluted atmosphere, to water (including sea water). It is used for anticorrosion protection of bridges, as well as in the chemical industry, in metallurgy, in the oil and gas industry. It can also be used as a stand-alone coating, not just as a primer. The temperature range at which it can be applied is from -15 oC to +40 oC with humidity from 30% to 98%.

Advantages:

• durability;
• resistance to aggressive metal environment;
• all-season application;
• recommended for use by OSRC and included in the regulatory documents of various industries;
• dries quickly (within 2 hours) even at a humidity of about 65-70%;
• heat resistance - up to 120 oC;
• Compatible with epoxy, polyurethane, acrylic and vinyl primers;
• used in large organizations.

Disadvantages:

• when applying, degreasing, dust removal is required, and cleaning from rust, scale and traces of old paint is required, which is not always possible;
• when applying several layers, you will have to wait until the previous layer is completely dry, and this is a waste of time;
• it is necessary to avoid prolonged contact of the composition in a container with air and direct sunlight, which is also not always convenient;
• it is also not very convenient that the holding time of the coating before the start of operation in aggressive environments is 7 days;
• the mixture is flammable, during its operation, precautions must be taken, since it belongs to the IV class of danger;
• large consumption per 1m2 - about 190-380 g.

Group of companies producing paint and varnish and decorative coatings. GK "Optimist" has several brands. Three types of primers belong directly to the Optimist brand. These are some of the most popular formulations today.

• "Betokontakt" - used for enhanced adhesion, contains a quartz filler, which provides the required surface roughness. It is suitable for outdoor and indoor use.
• "Primer for deep penetration" is divided into two types - only for interior work and for exterior and interior work.

• "Acrylic primer" also divided for outdoor and indoor use.
• Is there some more "Soil-concentrate 1: 10", which is designed for use in rooms with high levels of humidity, as well as for moisture insulation of walls made of concrete, brick and similar materials.

All of them are used for the treatment of drywall, concrete, brick, wood, cement plaster and other surfaces. Suitable for all types of surfaces. They create a transparent film (except for "Betonokontakt"), which protects against environmental influences and helps to reduce the consumption of paints and varnishes.

In general, the advantages of all primers include:

• anti-corrosion properties;
• antibacterial and antimycotic properties (well suited for protecting wood from mold and mildew);
• alignment of surfaces, which allows you to apply subsequent products more evenly and economically;
• high adhesion and penetrating qualities;
• fast drying - from 2 to 6 hours depending on the work surface;
• non-toxicity;
• impact resistance;

• resistance to chemicals;
• do not change the color of the main coating after application;
• profitability;
• suitable for a wide variety of surfaces;
• high penetrating and bonding ability;
• ease of application;
• low consumption - 110-250 ml / m2.

Disadvantages:

• unpleasant odor;
• short guaranteed shelf life - 1 year.

Russian manufacturer of building materials. This is a Russian company that produces a wide range of primers and other building materials.

At the moment, the range of this company includes 5 types of primers.

• "Primer for interior work" provide excellent adhesion of the applied compounds. It can be applied on drywall, foam and aerated concrete, monolithic concrete, in general, on any dense surface that does not absorb moisture well, as well as on porous surfaces.
• Primer "Universal" is universal, as the name implies, and meets the basic criteria for this type. This composition is well suited for both porous and smooth surfaces, as it contains sand, which makes the surface rough. This composition has antiseptic and high penetrating characteristics and does not yet create a film on the surface.

• "Deep penetration primer" gives enhanced strength to surfaces, it can be applied to concrete, aerated concrete, any fragile surfaces.
• "Primer for porous, highly absorbent substrates" differs from others in that it dries longer than others - about 4-6 hours. Its consumption is 0.3-0.4 kg / m2.
• Primer "Concrete-contact" - means for imparting adhesion to smooth concrete surfaces. Consumption - 0.2-0.3 kg / m2, dries for 2-3 hours.

In general, the advantages of all products of this company include:

• drying speed (approximately 1 hour, except for two types);
• profitability (consumption 100-200 ml per 1m2);
• high adhesive capacity of the composition;
• antiseptic and antibacterial properties;
• lack of smell;
• suitable for all surfaces (except for specialized types).

The company "North" is a Russian manufacturer that produces high quality paints and varnishes and fire retardant materials.

In particular, this manufacturer's assortment includes Nortex Grunt and Nortovskaya antiseptic primer. "North primer-antiseptic", in comparison with "Nortex Grunt", is characterized by higher antiseptic characteristics, it not only destroys fungus and mold, but also prevents its reappearance.

Both compositions are water-based and are designed to treat almost any surface. The primer has high adhesion, which prolongs the life of the painted surface, and it also has the ability to level the surface, as it contains polymer particles. This ability is well suited for painting, because it saves paint and allows it to be applied in a more even layer.

The advantages of this product:

• has good antiseptic properties;
• suitable for all types of surfaces;
• has adhesive properties;
• evens out the surface for painting;

• has a longer, compared to other manufacturers, shelf life - 2 years;
• she has a low consumption - 60-120 g / m2;
• suitable for indoor and outdoor use;
• environmentally friendly;
• easy to apply.

The disadvantages include all those aspects that are characteristic of acrylic primers, as well as the fact that they cannot be applied to ferrous metals as a protective coating.

You can learn how to prime the walls before painting with your own hands from the video below.