ULTRA GRIP™ CLEAR is a clear high-gloss, high-performance commercial grade, Penetrating Concrete Sealer & hydrostatic masonry waterproofing coating for floors walls and decorative surfaces. Waterproofing resin modified with flexible encapsulated polymers which penetrate into the masonry for the ultimate in waterproofing protection. This new technology has excellent penetration on porous surfaces and will resist up to 4 psi of negative or positive hydrostatic pressure, which is the equivalent of an 8.8 foot high wall of water. It will also reduce penetration by radon gas. ULTRA GRIP™ CLEAR is formulated with an environmentally friendly biocide to resist mildew growth. Conforms to ASTM D-7088 Resistance to Hydrostatic Pressure and ASTM D-6904 Resistance to Wind Driven Rain.