Starbrite WinterSafe -50°F Antifreeze Gallon Multipack (3,6,12,24,55)

Professional-Grade Protection for Marine Water Systems and Engines

Protect your boat during the off-season with Star brite WinterSafe -50°F (-46°C) Marine Antifreeze. Designed for reliable cold-weather and corrosion protection, WinterSafe is ideal for winterizing potable water systems, sanitation systems, and marine engines.

Its non-toxic formula is made with high-quality virgin propylene glycol, helping minimize residual odors and tastes in drinking water systems after winterization. Added corrosion inhibitors help protect metal engine components, seals, and plumbing materials from damage during storage.

WinterSafe is also alcohol-free, reducing evaporation so the antifreeze maintains its concentration and continues protecting throughout the storage season. Its bright pink color makes it easy to see when the antifreeze has fully circulated through water lines, sanitation systems, and engine cooling passages, while also helping indicate when systems have been completely flushed in the spring.

An excellent choice for boats stored in areas that experience mild to moderate freezing temperatures.

Key Features

• Non-toxic virgin propylene glycol formula
• Suitable for potable water systems, sanitation systems, and marine engines
• Helps protect against corrosion in aluminum, brass, copper, solder, engine components, and seals
• Ready to use — no dilution required
• Provides burst protection in copper pipes down to -50°F (-46°C)
• Alcohol-free formula helps reduce evaporation during long-term storage
• Bright pink color makes circulation and spring flushing easy to identify
• Recommended for areas where typical winter temperatures range from approximately 14°F to 18°F (-10°C to -8°C)