Z-CLEANER Super Concentrate is a multipurpose, super-concentrated cleaner that is also non-toxic, nonflammable and biodegradable. Z-CLEANERs industrial-strength formula is recommended to be diluted with water. The dilution ratio is related to the difficulty of the clean up job: lighter clean up jobs need less cleaner and more water and more difficult jobs benefit from less water and more cleaner. Z-CLEANER was specifically developed for difficult cleaning jobs on boats, campers, trailers and golf cart—as well as around the home. It was originally designed to tackle difficult clean up jobs on vinyl seating, but works just as well on fiberglass, inflatable dinghies, boat hulls, engine rooms, awnings, decks, rubber products, outdoor furniture and more. Not only does it lift dirt and grime and remove black streaks, but it also leaves a stain inhibiting finish. Formulated and bottled in the U.S.A. Quart.