EZ-On, EZ-Off takes the work out of hull cleaning.Quickly and easily remove scum line, rust stains and other deposits from your boat withEZ-On, EZ-Off. The water-based, buffered acid formula makesEZ-On, EZ-Off safer than traditional acid-based formulas.Key FeaturesCan be used on boats that are in or out of the waterRemoves stains from grassy marine growth, scum lime, and rust stainBuffered acid formula is safer than traditional acid-based hull cleanersFor use on fiberglass, metal and painted surfacesGallon