Hercules, 5 Gallon, Cryo-Tek -100 Anti-Freeze, 70% Virgin Propylene Glycol With Triple Protection Inhibitor Package, Pre-Mixed With Water, In A Ready To Use Formulation, Undiluted, Provides Freeze Protection to -60 Degrees Fahrenheit, Minimum Flow to -70 Degrees Fahrenheit, & Burst Protection To -100 Degrees Fahrenheit.