Hi-Tech Premium Rubberized Undercoat – the ultimate product for wheel wells and undercarriages! Use undercoat aerosol to spray a black, textured undercoat on your vehicle to protect it from moisture, salt and gravel. It’s also an excellent sound deadener, reduces body squeaks and road noise. Plus you can use it as a rust preventative on new panels, repairs, weld joints, and fender replacements. Aerosol can net weight 19.4 oz. California / OTC VOC Compliant.