Fiberglass cleaner from Toon-Brite is easy to use and fast acting. Cleaner is designed to quickly remove marine deposits, oxidation, scum, lime, and water stains from fiberglass boat hulls and bottoms. Biodegradable formula is environmentally friendly. Two quarts of this concentrate make up to 1 gallon and come in a gallon container, ready to be mixed. Includes attached sprayer for quick and convenient application.