Evans Waterless Coolants are the ONLY 100% waterless engine radiator coolants. All Evans Waterless Coolants are a chemical blend that result in more efficient cooling due to a higher boiling point. The increased boiling point of the coolant eliminates the occurrence of boil over, cavitation and detonation. Not only do our coolants not boil over, they do not freeze. At extreme cold temperatures, the coolants contract and become extremely thick, not becoming solid and expanding like antifreeze containing water. Because Evans Waterless Coolants do not contain water, electrolysis and corrosion are also eliminated.