Provides extended life protection for closed cooling systems. This 5 year, 1000 hour protection is ethylene glycol based and pre-diluted 50/50 with de-ionized water. It is Silicate and Phosphate free and will not cause gelling. Provides freeze protection down to -34 deg. F and boiling protection to 265 deg. F and is DexCool compatible. It is also compatible with conventional anti-freeze, but dilution will reduce extended life benefits.