Dupli-Color Paintable Rubberized Undercoat 16 Oz. Spray is a flexible and paintable rubberized black undercoat. This sound dampening coating reduces road vibrations and road noise while also providing superior corrosion resistance. The high-output trigger makes application fast and easy. Premium Undercoating is ideal for protecting wheel wells, gas tanks, frames and supports, weld joints, floor pans, doors and quarter panels. Corrosion Resistant High-Build Formula Protective, Paintable Rubberized Finish .