Peak, Gallon, RV & Marine, Ethyl Alcohol Blend Antifreeze, -50 Degrees, No Mixing Required, Safe For Brass, Copper, Other Metals & Plastic, Except Acetate Pipes, Safe, Odorless, Non-Staining, Ideal For Winterizing All Types Of Water Supply Systems Including Those In Boats, Recreational Vehicles, Trailers & Vacation Homes.