A concentrated blend of hydrofluoric and three other acids to clean and brighten aluminum. Do not allow aluminum brightener to contact glass, anodized aluminum, chrome or magnesium surfaces. For use on trailers, tank trucks, air conditioner fins and coils and other aluminum surfaces. Removes dirt, rust, scale, scum and diesel exhaust stains. May be used in a foam application system. Highly acidic; Use with extreme caution. Dilution 1:20. Read label fully and M.S.D.S. for warnings and precautions. CORROSIVE; OOISON; Use as step 1 in the two- step washing process. Should be used only by trained personnel wearing the proper safety clothing and equipment. D.O.T. regulations require that all Hydrofluoric and Sulfuric acid blends be shipped in a container rated W-Category, Packaging Group I. Shipped by freight line only.