-100°F RV, Boat & Water System Antifreeze, 55 Gallon

Star brite Premium -100°F Antifreeze provides burst protection down to -100°F (-73°C) for RV and boat water systems, marine engines, campers, and seasonal home plumbing. The propylene glycol formula is designed for use in potable water systems and works with copper, brass, and plastic pipes, making it a dependable choice for winterizing in the coldest climates.

This 55 gallon drum suits marinas, boatyards, RV dealers, service shops, and fleet operators that winterize many systems each season. The formula is ready to use with no mixing required, so it can go straight from the drum into plumbing and engines. Its corrosion inhibitor package helps protect metal components during winter storage without harming rubber, seals, or hose materials, and the bright dye makes it easy to see when antifreeze has reached every faucet and outlet during blow-through.

Key Features

• Burst protection to -100°F: Guards pipes, water systems, and marine engines against freeze damage in extreme cold
• Propylene glycol formula: Designed for use in potable water systems when used as directed
• Compatible with common plumbing materials: Safe for copper, brass, and plastic pipes
• Ready to use: No dilution required for fast, simple winterization
• Corrosion inhibitors: Help protect aluminum, copper, brass, and solder while remaining gentle on rubber, seals, and hoses
• High-visibility dye: Makes it easy to confirm full coverage when flushing lines
• Versatile applications: Suitable for RVs, boats, campers, vacation homes, and marine engine winterization
• Bulk 55 gallon drum: Economical supply for high-volume winterizing and professional service work

How to Use (Water System Winter Lay-Up)

• Drain the entire water system as thoroughly as possible. Open all hot and cold faucets and outlets, then use compressed air to blow out any remaining water.
• Drain the water heater and leave the petcock open. Bypass the water heater by disconnecting the inlet and outlet lines and connecting them together.
• Apply antifreeze directly to the water system and plumbing according to system size and the system manufacturer's recommendations.
• Follow all label precautions and handling instructions.