People who are far from repair do not understand why a primer for walls is needed. This material is applied under the finish, so it is not visible, and the money for the ground has to be laid out. And why do this if there is no visible effect from the primer? In fact, the primer plays a big role in interior decoration. This inconspicuous composition provides reliable adhesion of the finishing material to the base. In the construction markets, you can find various types of ground coatings.
Each variety is designed for a certain type of coating, therefore, for a quality repair, it is necessary to be able to choose the right primer. If for apartment renovation If you hire a team of specialists, then there will be no problems with the choice of material, the masters themselves will buy the right type of primer. If you decide to carry out finishing work yourself, then the choice of material will fall entirely on your shoulders. To choose the right primer, you need to know at least a little about its composition and properties. Therefore, we consider all types of ground coatings in more detail.
Varieties
Currently, the following types of soil coatings are offered to the attention of buyers:
Acrylic
This variety is considered the most popular among finishers. This primer is suitable for almost all types of base coats. In turn, acrylic primers can be classified according to their field of application:
- Universal. This primer is equally suitable for painting, wallpaper or ceramic tiles. Using this composition, you can not only securely fasten the finish to the base, but also prevent the occurrence of fungus and mold.
- Penetrating. Possessing the same properties as universal primers, penetrating primers are absorbed into the surface to a depth of about one centimeter. Such coatings are mainly used for wooden surfaces.
Acrylic primer applied roller or paint brush. In appearance, the acrylic composition is colorless, may be slightly cloudy. The drying time of the composition at room temperature is about 5 hours. Remarkably, acrylic mixtures are practically odorless.
adhesive
The composition of adhesive soil mixtures includes quartz sand. This provides a more reliable adhesion of the base to the finish. After the mixture dries, it resembles fine-grained sandpaper. This material is ideal for priming walls before applying heavy or colored plasters and ceramic tiles.
Adhesive primers are divided into the following types:
- White. This mixture is white or grayish in color. It is used for walls for painting or lamb-type plaster or "bark beetle".
- Colored. This mixture is multi-colored balls that are interconnected with an adhesive. It is used to tint the base of the wall. The primer is sold in portioned plastic buckets and is ready for use.
- Betonkontakt. A more powerful version of the previous compositions. Ideal for smooth surfaces.
Before applying the adhesive mixture, it is necessary to completely clean the substrate from contamination. To work with this composition, you will need a roller. The adhesive coating is applied in one layer. Drying time can vary from 8 to 12 hours.
Special
Such compounds are used for wooden surfaces. The composition of such mixtures includes antiseptics and varnish. Due to this, such mixtures not only provide reliable adhesion between materials, but also protect the wood from fungus and mold. After processing, the wooden surface looks like varnished. You can apply such a primer with a roller or brush, less often a spray gun is used.Depending on the composition, such a mixture can dry from 6 to 24 hours.
It should be noted that this is not a complete list of primers, just these compounds are used most often.
Using primer correctly
Having figured out why a primer is needed, we will consider compositions that are more suitable for processing walls and ceilings.
Ceiling
Ceiling primer - This is a mandatory procedure for the repair of an apartment. Some owners neglect the use of soil mixtures, especially when installing stretch or multi-level ceilings. This is the wrong approach. Even if it is not necessary to bond the base coat and top coat, using a primer will help prevent mold or mildew. The primer is usually applied to the ceiling in two layers: the first - along, the second - across. A roller is used to prime the main area, hard-to-reach places are treated with a paint brush.
For priming the ceiling, it is recommended to use acrylic mixtures or mineral-based compositions. They are deeply absorbed into the surface and practically odorless. These mixtures are colorless, so they can be used before painting the ceiling.
Walls
In most apartments, wallpaper is used as a finish for walls. The use of a primer will help to avoid swelling and ensure reliable adhesion of even heavy wallpaper. For brick, concrete and aerated concrete bases, it is better to use penetrating compounds. If the walls are leveled with drywall, then the best option would be to use "Betonkontakt" on a quartz basis. For wooden walls, it is necessary to use compounds that contain antiseptics. Wall primer for painting should be acrylic based. As a result, the main coating will be smooth and will not show through the paint layer. In the event that finishing is planned decorative plaster, a color adegious mixture is suitable.
To apply the primer to the walls, you can use a roller or spray gun. For high walls, you can use a roller on a telescopic handle. The walls are primed in several layers, each subsequent one is applied after drying out the previous one.
