Protects natural stone surfaces from staining. For stone countertops, floors, walls, vanities and even grout. Also for sealing all types of masonry, stucco, concrete and sanded grout. Has special blend of polymers that bond to the stone and creates a water and oil repellant membrane to prevent staining and allows the stone to breathe and release moisture vapors. Safe for interior and exterior use and is UL Classified for slip resistance. Coverage varies depending on surface.