Safe-Acid cleaner, descaler, deoxidizer and brightener. Rust, corrosion and mineral scale remover. Recommended as well for conditions which necessitate effective grease cutting. Great for removing reservoir, pool and boat water-line marks. Excellent for automotive and marine equipment. Non fuming acids composition - Biodegradable. Metal, concrete, porcelain, glass, fiberglass, enamel, rubber and vinyl surfaces.