Designer DRYLOK is the most advanced decorative finish in masonry waterproof coatings. Designer DRYLOK is formulated with an advanced color system that imparts a granite like filler system with multicolored specks. Designer DRYLOK has superior hiding capabilities when applied to patched or imperfect surfaces. Ideal for interior, exterior, above or below grade masonry walls, retaining walls, landscape walls, cinder blocks, concrete blocks, and brick. Stops 10 psi , greater than a wall of water 22 ft. high! Tested in accordance to ASTM D-7088 Resistance to Hydrostatic Pressure and ASTM D-6904 Resistance to Wind Driven Rain of up to 98 mph.