Gallon, -100 Winter Ban RV & Marine Antifreeze, Concentrated Propylene Glycol Based Formula With Inhibitor Is Used In The Marine & RV Industries To Provide Burst Protection Of Potable Water Systems As Well As Marine Engine Block Protection During Winter Storage, Used Full Strength Winter Ban-100 Will Provide Burst Protection To -100 Degrees Fahrenheit, May Also Be Diluted To Provide Burst Protection To The Desired Temperature, A Blending Chart Is Provided On The Label For Dilution Purposes, Use To Protect Plumbing Systems In Vacation Homes & Swimming Pools During The Winter Months, Odorless, Non-Toxic & Tasteless, All Ingredients Are Listed In The U.S. Federal Register Generally Regarded As Safe.