KITTEN ULTRA Wash n Wax is a two-in-one product, which combines a special blend of high quality cleaning agents and protective waxes. It removes heavy road grime and leaves a protective wax coating on your car as you wash. Ordinary household detergents often contain salt, which causes corrosion. KITTEN ULTRA Wash n Wax formula inhibits rust forming while you wash your car. When used regularly, KITTEN ULTRA Wash n Wax creates a lasting shine and is also ideal for boats.