Makes up to 5 gallons. Dissolves extreme grease, oil and dirt build-up. Use on engines, tools and heavy equipment. ZEP commercial industrial purple cleaner & degreaser is an extremely powerful and versatile cleaner. This high performance formula is built to quickly dissolve stubborn grease and oil stains from engines, heavy equipment and unfinished concrete. 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. No phosphates. Made in USA.