Aluma Bright is designed for heavy duty cleaning and is the best performing brightener in America. It will clean and brighten unpainted aluminum surfaces without damage. This product is very concentrated and specially designed to etch the surface of aluminum to remove not only the aluminum oxide that has formed but as well as the oil, grease, and carbon stack stains. Can be used on over the road trucks as well as pontoons and suitable with cold and or hot water. Contains corrosive materials.