Boat Magic Multi-Purpose Cleaner is the best choice for both boats and people, providing superior stain removal and cleaning abilities while mitigating the dangers of harsh chemicals. Boat Magic is safe for use on steel, rubber, and fiberglass hulls. Great for use in raw water coolant systems and marine toilets, it can also be used to clean outdrives and propellers when used as directed. Most importantly, Boat Magic won’t burn intact skin and puts off 90% less fumes when compared to other acid based cleaners.