Just as the Marine Engine Oil Treatment is specially formulated, so is the Marine Gear Oil Treatment. LuBoron recognizes the fact that in an environment where metal is exposed to the elements a product was needed to protect components from extreme corrosion and pitting. This Boron based additive adheres to the metal surface forming a bond so strong that rust and corrosion are displaced. Naturally the performance is significantly enhanced and life of the components extended as much as 90%. LuBoron Marine Gear Oil Treatment is for use in transmissions, transaxles and final drives. Boron CLS Bond is biodegradable. 10 oz (296 ml) US Patent # 5,431,830