EASY-ON BOTTOM WAX: A non-toxic, safe alternative to toxic copper based anti-fouling paints. For power, sail, trailered, fiberglass and aluminum boats. A clear, soft movable barrier surface, that can give full season protection in fresh water and intermittent salt water environments. Applies easily with a soft cloth in minutes. A 450 ml. bottle will treat a 24 foot boat and both outdrives. Over .250,000 satisfied boaters now using this system. Proven effective in algae and zebra marine growth areas. The thinner it is applied the better it works.