Formulated from 100% Australian tea tree oil, Tee Tree Power™ is the safe, natural way to eliminate unpleasant odors caused by mold and mildew on your boat. 2oz. Gel is ideal for use in head, bilge and hanging locker areas. Use the 4oz. Gel in larger areas, such the main salon and berthing areas. 8oz. Spray is ideal for cleaning porous and non-porous surfaces naturally, including galley counters, carpets and upholstery.