Zep Commercial Industrial Purple Cleaner, 1 gal: * Concentrated formula makes up to 25 gallons * Dissolves extreme grease, oil and dirt build-up * For use on heavy machinery, engine parts, construction equipment, fiberglass, unfinished concrete, masonry and asphalt * Spray or apply to surface with mop or brush * Easy rinsing formula * Not for use on painted surfaces, aluminum, or natural stone