Protect your marine investment with West Marine -50°F Engine & Water System Antifreeze, a premium winterization solution for both potable water systems and engine components. This ready-to-use formula provides burst protection down to -50°F (-46°C) in copper pipes, making it ideal for mild to moderate winter conditions. The pure virgin propylene glycol formula includes advanced corrosion inhibitors that safeguard aluminum, brass, copper, and solder components throughout the off-season. The alcohol-free composition prevents evaporation, maintaining consistent protection levels during storage. Its distinctive pink color serves as a visual indicator during system circulation and spring maintenance procedures. Perfect for boats stored in regions experiencing temperatures between 14°F to 18°F, this gallon-sized antifreeze requires no dilution and offers immediate protection upon application. For maximum effectiveness in colder climates, consider higher-rated options available in the West Marine antifreeze line.