PEAK Propylene-Glycol Antifreeze/Coolant 1 Gallon — Lower-Toxicity, Corrosion Protection

This 1‑gallon PEAK Sierra® antifreeze/coolant delivers a propylene glycol formula designed as a less-toxic alternative to traditional ethylene‑glycol coolants. It is supplied in a durable plastic container and formulated to offer reliable heat transfer and corrosion control for passenger cars and light trucks when mixed and used per manufacturer recommendations. The product label provides mixing guidance and safety information—always consult your vehicle owner’s manual before use.

How does this coolant protect my engine’s cooling system?

The PEAK Sierra® formula helps manage engine temperatures and reduce the risk of freezing or boiling when diluted correctly. It includes inhibitors to limit corrosion on aluminum, iron and other metal components of the cooling system, helping maintain radiator and water‑pump performance under normal driving conditions.

• Propylene glycol base for lower toxicity than ethylene glycol options
• Corrosion inhibitors tailored for common engine metals
• Suitable for standard cooling systems in passenger vehicles and light trucks

What mixing ratio and handling should I follow?

Mixing concentration determines freeze and boil protection: typically a 50/50 mix of coolant and water is used for balanced protection and heat transfer. Use distilled water if possible, avoid introducing contaminants, and follow label instructions and the vehicle manufacturer’s specifications for mixing and capacity.

• Common recommendation: 50% coolant / 50% water for year-round use
• Higher concentrate increases freeze protection but can reduce heat transfer efficiency
• Always check system capacity and top off only when the engine is cool

Is this product compatible with other antifreeze types and materials?

PEAK Sierra® is designed to be compatible with many cooling systems, but mixing with incompatible chemistries can reduce corrosion protection and performance. Before blending different brands or types, verify compatibility with your vehicle’s required coolant specification or perform a full system flush if uncertain.

• Best practice: match coolant type to vehicle manufacturer guidelines
• If switching chemistries, consider a complete system flush to remove old inhibitors
• Plastic bottle packaging is safe for storage and routine garage use

Who is this for: PEAK Sierra® Antifreeze/Coolant in the 1‑gallon size suits DIY mechanics, fleet maintenance crews, and vehicle owners who need an accessible, less‑toxic cooling fluid for routine topping off and seasonal maintenance. It’s useful for anyone who prefers a propylene glycol product, needs a single‑gallon container for small repairs or testing, and follows manufacturer mixing and safety guidance.