Rust preventer cavity wax is a semi-transparent black internal panel compound to restore OEM corrosion protection on inner body panels and cavities.
SEM Rust Preventer Cavity Wax, 1 qt Net Content, Liquid Form, Semi-Transparent Black, Composition: Solvent Naphtha (Petroleum), Medium Aliph, Solvent Naphtha (Petroleum), Light Aliph and Asphalt, Density: 0.8852 g/cc, 3000 mPa-s Viscosity, 425 g/L VOC