POR-15 Rubberized Under Coating is a flexible, paintable, textured black coating. It is the only undercoating with POR-15 Rust Preventive technology and will protect against moisture, salt, chemicals, dust, heat, and cold. It's an excellent moisture barrier for application over auto body repairs and creates an effective sound barrier that reduces vibration and deadens sound in wheel wells, quarter panels, fenders and under carriages. Provides superior adhesion to both painted and unpainted surfaces. POR-15 Rubberized Under Coating has superior resistance to road salt and will resist chipping and abrasions. May be used to insulate against engine and muffler noise, protects against dust penetration, and exhaust fumes.