What does a paint primer do?

A primer is an important and obligatory stage before wall coating, applying a putty or plaster or setting the wallpapers. The primer penetrates the walls, fills in micro cracks and fixes small particles and as a result, you get a hard base and even surface. Besides, priming improves adhesion to the surface, lessens consumption of the product and increases the life period of the finishing coating.

A primer can be divided into: