511 H2O is a water base penetrating sealer designed for the protection of all surfaces. 511 H2O is not a surface coating and will not alter the natural look. 511 H2O is VOC compliant and does not produce a strong odor. 511 H2O does not contain P.F.O.A. Independent test show 511 H2O out performs competitive products. Water & Stain protection for: Grout, Granite, Saltillo Tile, Quarry Tile, Marble, Slate, Concrete, Ceramic Tile, Limestone, Flagstone, Brick, Glazed Tile, Terrazzo. Special feature: Interior & Exterior use, Oil resistant, Safe & Easy to use. Coverage: 500 - 3,000 square feet per gallon.