Camco RV Antifreeze Concentrate - 36 ounces of Concentrate Makes 1 Gallon of Antifreeze, Just Add Fresh Water, Great for Use in RVs, Boats, Vacation Homes and Pools - Pack of 2 36 ounces of concentrate makes 1 gallon of antifreeze Great for use in RVs, boats, vacation homes and pools Burst protection down to -50F when properly diluted 100% biodegradable, GRAS, non-toxic, non-hazardous, safe with pets and kids Includes 2 gallon bottles