Primers are used in many construction and repairs. They provide better adhesion of the finishing layers to each other, make the surface more susceptible to subsequent layers and at the same time more durable. The choice of composition depends on the type of work and the surface to be treated.
For example, water-dispersed soils are of two types:
- deep penetration primer;
- strengthening primer.
The main difference between them is the size of the binder particles. The deep penetration primer has 10 times less particles than in strengthening formulations. Thanks to which it easily penetrates through the micropores of materials, impregnating the base to a depth of 10 cm. The particles adhere to each other to the entire penetration depth, increasing the strength of the materials. Reinforcing soils interact only with the surface layers.
How to distinguish different types of soils
The deep penetration primer looks like a muddy solution, while the strengthening composition is white and looks like milk. Just in reinforcing impregnations, large binder particles do not transmit light, so for
determining the type is enough to look at the color and type of solution. There is a difference in
solid content: a deep penetration primer contains from 10 to 12% (indicated on the package), if the indicators are higher, then you have a strengthening composition. Well, you can distinguish the type of composition by the appearance of
the base after processing. If a shiny film remains on the surface, then it is a bonding or strengthening primer, if the surface changes are invisible, then the composition is penetrating (the color may only slightly change).
These compositions have different applications: a deep penetration primer is applied to low-absorbing substrates (brick, drywall, etc.) under a multilayer finish (plaster, tile, etc.). It is advisable to use cheaper reinforcing compounds for painting or wallpapering if they are finished with plastered or painted with water-dispersion paint walls. That is, it is easier to save money on works using a strengthening solution, and for more complex multilayer finishes, you need to use expensive penetrating compounds.
Deep penetration primer: surface finish
After processing with this composition, the base becomes more durable and uniform, its adhesive properties increase. Surfaces are less susceptible to corrosion and fungal diseases, their water absorption capacity is reduced, and the influence of external factors is reduced. After the first treatment, the surface dries for 1-3 hours at a temperature of 17-24 ° C, the second layer of time for drying will require a little more.
For the treatment of walls and ceilings, screeds and self-leveling floors, plasters and foam concrete walls, masonry and concrete substrates, a deep penetration primer is suitable for all of these surfaces. Its consumption depends on the absorbency of the base and averages 80-150 g / m 3 . When applying in a single layer 10 liters of primer is enough to treat 100m 3 of a surface having a low absorbency.