The modern market for building materials is constantly updated with new compositions. They feature improved performance. This allows you to carry out construction and repair work faster. The end result using innovative technologies is of high quality. One of the important tools that is used in finishing work is an adhesive primer.
The category of funds presented included several different compositions. To choose a suitable option for construction and repair work, it is necessary to consider the technical characteristics, features of each type of primer.
general characteristics
The start of repairs in the apartment is associated with a host of questions. What material for finishing work will be required in a particular case, many owners of private real estate do not know. Therefore, the advice of experienced repairmen will help in solving this issue.
Adhesion is the ability of the base to adhere firmly to the finish. In this case, the layer deposited on the surface does not peel off. He will be held on the base for a long time. Some materials require increased adhesion. In this case, a special primer is used.
Many similar compositions are on sale. They are capable of more or less enhancing surface adhesion. When choosing, it is important to consider what characteristics the base is marked with. There are rough and smooth materials. When processing them, the primer should have not only adhesive properties. A number of additional effects are present in similar formulations.
Rough surfaces
The properties of the adhesive primer may vary significantly depending on the type of composition. All surfaces on which the presented materials are applied are conventionally divided into two groups. These are rough and smooth bases. When choosing a primer, it is important to consider the type of surface on which it will be applied.
All adhesive primers that are used for rough substrates have a number of characteristics. They have high penetration. Even dusty surfaces are glued and strengthened qualitatively. The initial characteristics of the base in this case are markedly improved.
Pores of surfaces are closed. The consumption of finishing materials in this case is significantly reduced. Paint, glue, and plaster are evenly absorbed. If special components are present, the primer may interfere with the development of mold and mildew on the surfaces.
Smooth surfaces
It should be noted that the primer for concrete can differ significantly from a similar plastic agent. There is a large list of surfaces that do not have pores and are not highly absorbent. For them, the primer presented above is not suitable.
Smooth surfaces include plastic, glass, metal, paint and other similar materials. It is for them that compounds are used that are called primers. They are characterized by high adhesive ability. Such compositions make the surface rough. Finishing in this case can be qualitatively fixed on the basis.
One of the most popular materials that is used in this case is Concrete Contact. It is made by many large companies. The composition of such primers differs significantly from products intended for rough surfaces.
Structure
To understand how adhesive primer differs from concrete contact, what material to purchase for different surfaces, it is necessary to consider their composition. The presented products are made on the basis of polymers. They add quartz sand of a certain fraction. The smaller it is, the thinner will be the layer of cured film from the primer on the surface.
For compositions intended for smooth surfaces, the presence of more adhesive components is characteristic. If the sand fraction is large, the surface will be rougher. Therefore, it is important to consider what type of finish will be applied later.
In addition to the components listed above, additional components may enter the primer. They will give the composition water-repellent, antibacterial, anti-corrosion qualities. It should be noted that, regardless of the variety, all soils are vapor permeable. This is a positive characteristic of the material.
Appointment
The start of repairs in the apartment is accompanied by the purchase of the necessary materials. You should know in advance in which cases a primer cannot be dispensed with. First of all, it is used when facing. Before installation of a tile, a laminate, bulk floors or linoleum, a primer is used.
The presented composition must be applied to the surface before painting. This significantly extends the life of the finish. For latex, acrylic, water emulsion, oil and other varieties of paints, a specific composition is selected.
Another area of application for primers is plaster. Application of starting and finishing compositions is not possible without adhesive. This becomes especially important when the layer of plaster is 3 cm thick. In this case, the finish does not slip, does not collapse.
Primer action
Primer compositions can be divided into two groups. The first category includes reinforcing materials. The second group included a penetrating adhesive primer.
Reinforcing compounds are characterized by a significant increase in the adhesion of the finish to the base. The dispersion filler in this primer is much larger. This ensures maximum adhesion for smooth surfaces. If it is necessary to create a finishing layer on a smooth material in which there are no pores, it is the reinforcing compositions that are used. They increase the strength of the surface on which they are applied.
Deep penetration primers are used for porous materials. They contain a much smaller amount of dispersion particles. Such compositions penetrate into surfaces to a depth of 10 cm. Their adhesive characteristics will be much less.
Structure
There are several varieties of adhesive primers that differ in composition. There are 4 main categories of funds. The first group includes an acrylic adhesive primer. These are environmentally friendly compounds. They do not emit a pungent odor. This is the most versatile variety of soil.
Alkyd varieties are used for internal processing. They are made on the basis of organic solvents. Such formulations have a pungent odor. Suitable for non-absorbent surfaces.
Glifthal primers are applied to metal, wooden surfaces. They dry for a long time. Also, these compounds should be used only for dry rooms.
Perchlorovinyl primers are used for a wide range of surfaces. This is a toxic compound. It is used exclusively for outdoor work. The soil dries quickly. After an hour, you can proceed to the subsequent finishing.
Concrete Contact
Choosing a primer for concrete and other smooth surfaces, you should give preference to such a variety as "Concrete Contact". The presented product was first produced in Germany. It was first introduced to the market by Knauf. Subsequently, other world brands began to produce the presented composition.
This is a universal tool that can significantly improve the adhesion of the finish to the surface. It is used not only for concrete, but also for glass, metal, tile and even painted surfaces.
If the base is characterized by a low ability to absorb moisture, it is necessary to give preference to “Concrete contact”. Today, in addition to Knauf primers, the compositions of Ceresit and Prospectors are very popular with this type. Their price varies greatly. It can be, depending on the manufacturer, from 200 to 500 rubles. for 1 liter
Acrylic primer
If you plan to create an adhesive layer for an absorbent surface, apply deep penetration primers. They are made on a water basis. These are environmentally friendly acrylic compounds. The most famous and high-quality adhesives in this area are adhesion primers Knauf and Ceresit.
The presented compositions process not only porous concrete, but also plaster before subsequent finishing, gypsum plasterboard sheets and other similar surfaces. In some cases, it will be necessary to apply several layers of the product. If you plan to process wood, the primer should include antiseptic and pigment masking tar spots.
Acrylic primer can be used in any room. It is highly environmentally friendly. Due to the absence of a pungent odor, this variety can be used even when decorating a bedroom or children's room.
Alkyd primer
One of the popular primers are alkyd compounds. This variety is used in the process of applying paint to prepared surfaces. It is also used when old paint has already been applied to the substrate. The product is characterized by quick drying.
The Otex adhesive primer is in great demand in this category . It is produced by the world famous company Tikkurila. This primer is used before painting surfaces of galvanized steel, aluminum, as well as plastic, fiberglass and ceramic tiles.
The presented composition is characterized by a matte structure. It has a white color. However, if necessary, the composition is tinted with the help of special additives. It can be used as an intermediate layer before painting. The lower old layer in this case will not affect the hue of the finish.
Consumption
Considering the technical characteristics of the adhesive primer, you should pay attention to its consumption. This indicator depends on a number of factors. First of all, the surface structure on which the product is applied affects the flow rate. The more porous it is, the more primers will be needed. However, after its application, you can save on the amount of subsequent finishing.
Also, the fraction of sand introduced into the base affects the flow rate. If it is small, the primer film will be thin. In this case, less material will be required for surface treatment. A large fraction leads to an increase in the thickness of the layer, the consumption of the primer.
To determine how much money you need to purchase, you need to read the manufacturer's instructions. For thin coat primers, the consumption can be at least 20 g / m². The average value of this indicator is 150-200 g / m². If necessary, you need to apply the product in two layers. In this case, the primer consumption increases to 500-550 g / m².
Application Features
In order for the adhesive primer to improve the quality of finishing work, it must be used correctly. All requirements are stated by the manufacturer in the instructions. In some cases, the surface will need to be cleaned, remove traces of dirt and grease.
Next, the first coat of primer is applied. To do this, apply a brush or roller. Professional installers can apply the spray method on a surface. In this case, the processing is carried out in a short time, and the consumption of materials is significantly reduced.
The layer must dry thoroughly. In some cases, it will be necessary to apply the primer to the surface again. After drying, many formulations leave a white or pink film. If individual sections have not been processed on the wall, this will be visible. In these places, a repeated application of the composition will be required.
Recommendations of specialists
Experienced builders recommend that you carefully consider the choice of adhesive primer. In this case, it is important to take into account the features of the processed surface, subsequent finishing materials, as well as environmental conditions.
It is not recommended to apply the product on the surface at low temperatures. Processing is carried out at an average level of humidity. Ambient temperature should be + 5º or higher. Otherwise, the quality of the composition is significantly impaired.
It is only necessary to purchase products for surface treatment in specialized stores. You should not buy cheap, little-known compounds. They are not able to provide the required adhesion strength of different materials.
Having considered what the adhesive primer is, its features and varieties, you can choose the best option that meets the conditions of the finishing work.