Quality antifreeze that protects potable water systems and engines against freeze damage. Winterizing your boat for the off season is an excellent way to protect your investment and avoid costly repairs in the spring. West Marine Pure Oceans -100 (-73C) Marine Antifreeze provides outstanding cold weather and corrosion protection for drinking water, sanitation systems and all engines. Ideal for regions with expected winter lows below 0F, this non-toxic formula uses pure virgin propylene glycol for quality and effectiveness. As an added benefit of using non-recycled propylene glycol residual smell and tastes are reduced. Corrosion inhibitors have been added to prevent damage to metal engine components and seals.Our Pure Oceans antifreeze is alcohol free and will not evaporate and leave engine parts and areas of pooled water less protected later in the winter.The bright triple die pink color lets users know when antifreeze has traveled through water lines, sanitation system lines or engine cooling systems; the die also serves as an indicator when flushing systems in the spring. For antifreeze that works on both engine and water systems, look to West Marine and Pure Oceans for a safe, effective, and ready to use solution. See our winterization headquarters by clicking on How to Winterize Your Boat from the West Advisor tab above. There you will find step by step tutorials on winterizing different systems as well as an abundance of information to help you make informed decisions that will keep your boats systems safe in the off season. Key Features Non-toxic virgin propylene glycol formula30% virgin glycol for burst protection in copper pipes to -100F (-73C)Added inhibitors prevent corrosion in engine components and seals including aluminum, brass, copper and solderReady to use—does not need to be diluted55 gallon drum is ideal for boat yards, dealers and other high volume applicationsSafe for potable water systems and enginesAlcohol free to reduce evaporation and maintain protection levels throughout the winterIdeal for regions that experience temperature ranges between -58F to -63F (-50C to -52C)—see our