Four times the protection of conventional waxes. KBS cavity coater hinders the formation of rust and corrosion on all metal surfaces. The self-healing film resists the harmful effects of alkaline solutions, most chemical and acid vapors, road salt, steam, and salt water. An easy one-step application offers long-lasting protection. Whether you paint it on or apply with the convenient aerosol spray, this cavity coater wicks into seams and joints—and KBS has wands available for those hard-to-access cavities.