(12) 20 oz. cans. Rubberized Leak Repair is a flexible rubber coating that dries quick to seal water leaks and cracks. It penetrates deep into the surface to assure a firm, tough bond. It has excellent adhesion to concrete, wood, felt, gypsum, plastic, glass and metal. Forms a tough waterproof seal as it creeps into cracks and bonds to the surface providing rust and corrosion inhibiting qualities while filling surface pores. The protective film withstands normal hydrostatic pressure. Lower cost per ounce than other brands. Applications: Use on metal edging and flashing (including galvanized), gutters (PVC, metal or galvanized), roofing (composition and metal), windows, planters, and other metal, wood, concrete, masonry or gypsum surfaces.