511 Impregnator is the original penetrating sealer designed for the protection of all medium to dense porous surfaces. 511 Impregnator forms an invisible barrier that is resistant to moisture and stains while allowing vapor to escape. 511 Impregnator is not a surface coating and will not alter the natural look. All surfaces treated are harder and less slippery. WATER, STAIN & SLIP PROTECTION FOR: Sanded Grout, Quarry Tile, Ceramic Tile, Glazed Tile, Porcelain Tile, Polished Granite, Polished Marble, Stucco, Slate, Terrazzo, Quartz, Travertine, Agglomerate. SPECIAL FEATURES: Interior & Exterior Use. Less Expensive. OK for Food Areas. Superior Coverage. Easy to Use. Weather Resistant. U.V. Transparent.