For the most demanding conditions. For above or below grade masonry walls, basement walls, retaining walls, foundations, landscape walls, cinder blocks, concrete blocks, bare concrete swimming pools, stucco and brick. Formulated to resist mildew growth onthe paint film. Stops 12 psi. Passes ASTM D-7088 Resistance to Hydrostatic pressure and ASTM D-6904 resistance to wind driven rain. Covers 75 to 125 sq. ft per gallon depending on surface porosity.