Primers should have good adhesion to different surfaces, both new and previously treated, providing a good foundation for proper coating material. The primer smooths the surface tension coating, thus covering material will better adhere (bind) to the substrate. It's hard enough to put a finishing coat on a new old covering as a tool to easily inflicted material glides over the surface. The primer provides a proper basis for the roughness of the successful application of a topcoat. Compared with a topcoat, a primer often have higher solids content and, therefore, they have a higher occupancy of that better allows you to hide imperfections. However, for high quality paint finish is very important to thoroughly prepare the ground, as paint can not hide surface defects and the defects on the contrary a clear stand after the finish paint.

Primer paint dries quickly and is easy to sand, which is important in the preparation of the surface. Deal paint over the primer, compared with a topcoat can be faster and, therefore, at this time-saving. Hiding power of a good primer, usually even better than the coverage topcoat. Nevertheless, it is better tinted primer close to the tone of the cover with a layer of color applied to a smaller number of layers in the final painting. In most cases, a primer and topcoat for well-covered and smooth finish. Primers reduce the absorption of the surface.

There are big differences in absorbency substrates. Especially porous gypsum-based fillers and powdered cement based putty has a relatively high absorption, while a sheet of cardboard to drywall sections absorption is low. If the absorption of the surface before painting primer is not aligned, then a finishing layer is more opaque in places of joints containing filler with a high absorbency. If you use no absorbent primer decreases the absorption of the substrate. If such a surface to paint, then application of the primer increases the duration of work with a topcoat, which in turn will contribute to the achievement of a lighter consistency of results.