Starbrite 32700 Premium Boiler System Antifreeze -100 , Gal.

Ethanol-free, safe, odorless, tasteless, and non-flammable premium hyrdronic heating and cooling system fluid. Made from virgin propylene glycol (PG), this heat transfer fluid contains premium corrosion inhibitors to protect internal components. It's formulated to have a high specific heat and boiling point, and provides burst protection down to -100 F (-73 C) at full strength. Works in Aqua-Hot and Hydro-Hot systems as a heat transfer fluid, and is perfect for use in traditional boilers, closed boilers, and solar systems. Made in the USA.