(12) 20 oz. cans. Corrosion inhibiting formula seals out moisture, deadens sound and will NOT peel off. Applications include gutter sealer, concrete, tree wound sealer, asphalt crack filler and more. Paintable, Prevents Rust and Lays Down Smooth With A Black Finish. Deadens Sound, Waterproof, Elastic, and Will Not Crack. Deadens Sound.