The 18-452 from Utility Wonder is a Anti-Freeze, No-Freez, Non-Toxic, 5 gallons. It's a chemical added to water-based liquids in order to lower the freezing point. Great for use in boilers, hydronic systems, summer homes and RVs as well as sprinkler systems and more. This formula is conveniently non-toxic and ready to use. This antifreeze comes in 5 gallon container.