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Sierra – Propylene Glycol Antifreeze + Coolant

Safer than conventional antifreeze for people, pets, and wildlife.

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Non-Toxic Environmentally Friendly Antifreeze

PEAK® is the pioneer and market leader in the safer propylene glycol (PG) antifreeze category. SIERRA® Antifreeze/Coolant is formulated with PG rather than ethylene glycol – the base for traditional antifreeze. Because of its PG 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. Specific benefits include:

        • Provides excellent engine protection against freeze-up, boil-over and corrosion, while maintaining heat transfer properties
        • Helps prevent accidental poisoning of pets
        • Helps protect wildlife and the environment SIERRA® Antifreeze is a propylene-based antifreeze that requires the use of a special ball tester to check its freezing point.


Safer than conventional antifreeze for people, pets and wildlife.

PEAK® Antifreeze & Coolants meet or exceed all industry specifications and performance standards. A wide variety of patented formulas protects against scale, rust and corrosion of cooling system metals, while providing maximum freeze-up and boil-over protection.

OLD WORLD INDUSTRIES, LLC warranties this product against faulty manufacture and defective materials. OLD WORLD INDUSTRIES, LLC. will not accept product liability for application or use of this product.