United Gilsonite Lab Drylok Basement & Masonry Waterproofer Concrete Sealer. Pack of 4 of United Gilsonite Lab Drylok Basement & Masonry Waterproofer Concrete Sealer. Smoother waterproof paint is perfect for the most demanding conditions. Fully transferable 15 year warranty. Ideal for interior, exterior, above or below grade masonry walls, basement walls, retaining walls, foundations, landscape walls, cinder blocks, concrete blocks, bare concrete swimming pools, stucco, and brick. Ceramic fortified for the ultimate in waterproof protection. Specially formulated to resist mildew growth, with the incorporation of a nonhazardous green biocide, on the paint film. Stops 12 P.S.I., that's greater than a wall of water 26 ft. high. Tested to ASTM D-7088 resistance to hydrostatic pressure and ASTM D-6904 resistance to wind driven rain. Clean up with soap and water. Coverage: 75 to 100 sq. ft. per gallon. Tintable with 50% of color formula. Not to exceed 2 fl. oz. of colorant per gallon. No. 831985: Container Size: 1 Gal., Color: White, Finish: Flat, Coverage Area (Sq. Ft.): 100, Base Material: Ceramic Fortified Latex, Interior/Exterior: Interior / Exterior, Pkg Qty: 1, Package Type: Can No. 831987: Container Size: 5 Gal., Color: White, Finish: Flat, Coverage Area (Sq. Ft.): 500, Base Material: Ceramic Fortified Latex, Interior/Exterior: Interior / Exterior, Pkg Qty: 1, Package Type: Pail WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. This listing is for a pack of 4. WARNING: California Prop 65 - www.P65Warnings.ca.gov.