Cheap insurance for a long winter. 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 -50 (-46C) Marine Antifreeze provides the ultimate in cold weather and corrosion protection for drinkingwater systems, sanitation systems and all engines. Ideal for regions with a mild but freezing winter, 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 an antifreeze that works on both engine and water systems, look to West Marine 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 formula 30% virgin glycol for burst protection in copper pipes to -50F (-46C) Added inhibitors prevent corrosion in engine components and seals including aluminum, brass, copper and solder Ready to use—does not need to be diluted Safe for potable water systems and engines Alcohol free to reduce evaporation and maintain protection levels throughout the winter Ideal for regions that experience temperature ranges between 14F to 18F (-8C to -10C); for colder regions we recommend using non-toxic Pure Oceans antifreeze with a -60F or -100F rating—see our Antifreeze 101 for a complete guide to selecting the right antifreeze for your climate and application.