Aervoe Undercoating & Sound Deadener Not available for sale in CA. Strong sound deadener will not flake or chip off. Tough and flexible, give protection against road salts, corrosion resulting, mild alkalis and acids, dust, fumes, and moisture. Undercoating and Sound Insulator is quick-drying, rubberized film offering maximum coverage and superior insulation against road and chassis noises. Pack of 1