Penray 4424 Rubberized Undercoat - 16-Ounce Aerosol Can Quick Drying, Black, Rubberized, Waterproof Coating Protects Surfaces from Rust, Corrosion, Extreme Heat and Cold, Dust, Fumes and Road Salt May Be Painted Over with NO Bleed-Through Automotive Applications Include: Undercarriage, Frame and Wheel Wells to Help Reduce Road Noise General Uses Include: Minor Roof Repairs, Gutters, Downspouts and Foundations