Sustain metals with this ready-to-use antifreeze coolant from Zerex. This ready-to-use antifreeze coolant has a boiling point of 330 degrees and the specific gravity is 1.245. The pH is 11.5. This 32 oz. red antifreeze coolant meets standards: ASTM, SAE. Its applications include: Proprietary heavy-duty formula is meant to protect diesel engines from liner pitting and hardwater scale deposits. At max. service life, add Extended Life Extender No. 4NPP7 to stretch drain interval to 600,000 mi./14,000 hr./6 yr. OAT formula. 300,000 mi./7000 hr./3 yr.