ULTRA GRIP™ PLUS is a bright extra white, smooth finish, high-performance industrial grade 15 year, concrete & masonry waterproofing coating. 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 15 psi of negative or positive hydrostatic pressure, which is the equivalent of a 33 foot high wall of water. It will also reduce penetration by radon gas. ULTRA GRIP™ PLUS 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.