MATCRETE ConSeal Natural-Look Sealer is a fast curing, deep penetrating, non-film forming sealer for porous above ground masonry surfaces. When applied to all types of porous tiles, masonry and concrete surfaces. ConSeal will penetrate the pore structure and make it highly water resistant. Water, in most applications will not penetrate the surface. Air or vapors are not hindered and treated surfaces can still "breathe".