PEAK® RV & Marine Antifreeze is ideal for winterizing all types of potable water plumbing systems including those in boats. recreational vehicles, trailers, vacation homes, as well as swimming pool filtration and heating systems. Ready to use. No mixing required. Safe to brass, metal, copper, and plastic (except acetate) pipes. Tasteless, odorless, safe with used as directed. Ideal for Winterizing! Negative 50F Burst Proof Guaranteed Use Full Strength. No Mixing Required. Made in the USA.