Designed for pretreatment of smooth, dense, poorly absorbent substrates in order to increase adhesion to the surface of subsequent finishing layers, for example, decorative plasters and textured paints, as well as before laying ceramic tiles in swimming pool and drinking water tanks. It has good hiding power and whiteness. After drying, it forms a rough surface, reduces the water absorption of the base, and is water resistant. Before application make sure the surface is clean and dry.