An asphaltic, rubberized undercoat for use on cars, trucks and trailers, etc. To prevent rust and deaden sound. Paintable undercoat leaves a firm, black, resilient, rubbery texture which will provide years of protection. Additional applications and uses: on trucks, farm and construction equipment, in collision shops, as a tree wound dressing, and gutter and flashing sealer. Seals electrical boxes and fittings. Seals concrete and asphalt driveway cracks.