Drylok, Gallon, Clear, Non-Pigmented Masonry Waterproofer, Specifically Formulated For Use On Bare Masonry Floor & Wall Surfaces, Patent Pending Technology Provides A Durable, Waterproof, Easy To Clean, Non-Yellowing High Gloss Finish, It's Perfect For Waterproofing Interior & Exterior Concrete Floors, Poured Concrete Walls, Split-Faced Block, Concrete & Cinder Block, Stone, Brick, Stucco & Pre-Cast Decorative Items, Environmentally Safe Green Biocides, Resists Growth Of Mildew On The Dry Paint Film, Been Tested In Accordance To Requirements Of ASTI D-7088 Resistance To Hydrostatic Pressure At 4 PSI & ASTI D-6904 Resistance To Wind Driven Rain Of 98 MPH.