3M™ Cavity Wax Plus 08852 is a non-hardening, self-healing corrosion protection coating for internal auto body panels and structural enclosures, as well as new replacement parts. It is designed to cover and seal internal joints, hem flanges and other areas where OEM e-coat may be compromised. It will not chip, peel or crack. Use the 3M™ Cavity Wax Plus Wand Kit for 360° coverage.Developed specifically for corrosion protection on internal automotive panels and structural components, the 3M Cavity Wax Plus 08852 is formulated to coat and seal areas such as door skins, rocker panels, interior quarter panels and frame rails. It is excellent for use wherever OEM e-coat may be compromised during the repair process, as well as on new replacement parts.