What is the purpose of impregnating / penetrating sealer?
Impregnator or penetrating sealers are designed to penetrate below the surface of the stone and either deposit solid particles in the pores of the stone, or coat the individual minerals below the surface. Penetrating sealers work by restricting water, oil and dirt from entering the stone or tile. Properly applied, a good impregnator sealer will not affect the texture or the appearance of the stone. For all polished and smooth surface, an impregnator is recommended since sealers, which are surface coats, will not bond and will be easy abraded.
