Fountain of Youth Restoration product is a fast-acting boat hull cleaner and rust/calcium lime organic water stain remover. Works when others don't! Stains disappear like magic! Odor-free boat bottom cleaner, rust/ hard water stain remover and biodegradable. The unique formula is highly effective yet safer than traditional liquid rust stain removers. Our goal is to provide high-quality cleaning products that fit the needs of the consumer with guaranteed results. Removes rust stains from fiberglass, fiberglass boat hull, stainless steel, fabrics, clothing, concrete, wood, copper, rims, vehicles, brake dust, leaf stain, carpets, bathtub, sink, chrome, most painted surfaces and MUCH MORE. Will also clean ceramic grout. Removes grease and organic stains from concrete (scrub with the brush). Part # 2013. Fast-acting rust/calcium lime organic water stain remover. Works when others don't! Stains disappear like magic! Fast, odor-free rust; hard water stain remover and biodegradable. Power #1 One is a Fountain of Youth Restoration Product. Made in the USA.