Industrial Purple Degreaser and Cleaner Concentrate, 128 oz Deep cleaning shop grade degreaser For use on: heavy machinery, engine parts, construction equipment, fiberglass, unfinished concrete, masonry and asphalt Not for use on: painted surfaces, Aluminum, brass, chrome, copper, marble, slate, granite, natural stone, wood and other alkaline sensitive surfaces as damage may occur When cleaning oil stains from concrete floors, make sure to scrub the stain using a stiff bristle brush Zep Industrial Purple Degreaser and Cleaner Concentrate, 128 oz