-100°F Engine & Water System Antifreeze, Gallon

Model # 363798 Mfg # 363798
3.5 out of 5 Customer Rating
Advice & How-To
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.


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-100°F Engine & Water System Antifreeze, Gallon
Model # 363798 Mfg # 363798
3.5 out of 5 Customer Rating
Advice & How-To
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.


Get 5X West Advantage Points on all purchases for a limited time! Not a rewards member? JOIN NOW

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West Marine -100°F Engine & Water System Antifreeze, Gallon

Protect your boat this winter with West Marine -100°F Engine & Water System Antifreeze, the ultimate solution for severe cold weather conditions. Perfect for boat owners who want to ensure their vessel is safeguarded during the off-season, this premium antifreeze offers exceptional cold weather and corrosion protection.

Why Choose West Marine -100°F Antifreeze?

  • Superior Cold Weather Protection: Ideal for regions where temperatures plunge below 0°F, this antifreeze provides reliable freeze protection with a rating down to -100°F (-73°C).

  • Non-Toxic Formula: Made with pure virgin propylene glycol, this antifreeze is non-toxic, reducing residual smells and tastes while ensuring safe use for potable water systems and engines.

  • Enhanced Corrosion Protection: Infused with advanced corrosion inhibitors, it prevents damage to metal components and seals, including aluminum, brass, copper, and solder.

  • Alcohol-Free: This antifreeze is alcohol-free, reducing evaporation and maintaining consistent protection throughout the winter months.

  • Ready-to-Use: No need for dilution—this antifreeze is ready to use right out of the gallon, simplifying your winterizing process.

  • Bright Blue-Green Color: The vivid triple-dye blue-green color helps you easily identify when the antifreeze has flowed through water lines, sanitation systems, or engine cooling systems, and serves as a clear indicator for spring flushing.

  • Ideal for Extreme Cold: Specifically designed for regions experiencing temperatures between -58°F to -63°F (-50°C to -52°C), ensuring comprehensive protection even in the harshest conditions.

Winterize your boat with confidence and avoid costly repairs come spring. Choose West Marine -100°F Engine & Water System Antifreeze for the best in cold weather protection and peace of mind.

For a complete guide to selecting the right antifreeze for your climate and application, see Antifreeze 101.

Best Use -100 Degrees
Capacity 1 Gallon
Color Blue/Green
Type Antifreeze

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