ComStar Freeze Free -100ºF, Aluminum Safe Boiler Anti-Freeze, Propylene Glycol Formula with Freeze Protection to -100º F Burst, Compatible with Aluminum Components, Made in USA, 5 Gallon (35-730)

‌Safe on aluminum. The industrial coolant and heat transfer fluid. Protects to -100º f ComStar international Inc. Is the world's most comprehensive manufacturer of environmentally safe, industrial strength chemical products ComStar has been a leader in developing, manufacturing and marketing over 300 specialty products Designed specifically for the trade professional for more than 45 years"