Keep metals protected from harsh conditions with this ready-to-use antifreeze coolant from Zerex. This pre-diluted antifreeze coolant has a freezing point of -34 degrees and boiling point of 275 degrees. The specific gravity is 1.110 and the pH is 11. This 55 gal. orange antifreeze coolant meets standards: ASTM. It comes conveniently pre-diluted so you won't have to fuss with adding water. Its applications include: Silicate- and phosphate-free formula is automaker-approved for use in GM and SAAB vehicles that require OAT DEX-COOL, and in GM and SAAB vehicles. OAT formula. 150,000 mi./5 yr. For use with passenger cars and light trucks.