UltraCare Penetrating SB Stone, Tile & Grout Sealer is a natural-look, solvent-based penetrating sealer that provides maximum protection against most common stains. It is safe for use on all interior and exterior natural stone (marble, limestone, sandstone, slate, granite, travertine, etc.), unglazed porcelain and ceramic tiles, masonry, quarry tiles and cement grout. The product can also be used as a pre-grouting sealer. UltraCare Penetrating SB Stone, Tile & Grout Sealer is expected to protect against most common stains for up to 5 years. This period will vary depending on hardness and texture of surface, location of area, surface wear, and the frequency and nature of maintenance products used. Weather conditions, harsh cleaning methods, and highalkaline, acidic or solvent-based cleaners will affect wear.