POR-15 41304 Black Chassis Coat - 1 Quart CHASSISCOAT BLACK is a permanent black coating developed for application over painted and unpainted surfaces. Apply over POR-15 Rust Preventive Paint for the toughest, most permanent protection against rust and corrosion ever developed. CHASSISCOAT BLACK is non-porous and will not crack, chip, or peel when properly applied according to directions. CHASSISCOAT BLACK is not sensitive to ultra-violet light and may be exposed to sunlight without damaging consequences. Paint Topcoat, Semi-Gloss Black, Chassis Coat, Quart,