SIERRA Antifreeze & Coolant Propylene Glycol
PEAK is the pioneer and market leader in the safer propylene glycol (PG) antifreeze category. SIERRA Antifreeze/Coolant is formulated with propylene glycol rather than ethylene glycol – the base for traditional antifreeze. Because of its propylene glycol formula, SIERRA Antifreeze is less toxic and therefore safer for people, pets, and wildlife than conventional antifreeze. It is a premium automotive coolant that provides excellent freeze-up and boil-over protection and outstanding corrosion protection.