Engine Ice Hi-Performance Coolant is biodegradable, phosphate free & non-toxic; while reducing operating race temperatures by as much as 50F and effectively keeping boil over temperatures to 256 F or less and freeze-up protection to -27 F. Engine Ice Hi-Performance Coolant is premixed with de-ionized water to protect your water cooling system from scarring, scaling and to effectively provide "prolonged optimum operating temperatures." "Right out of the bottle" Engine Ice Hi-Performance Coolant is "ecologically safer" than regular coolants for wildlife and the environment. What's even more amazing is that it works far better than most any other engine coolant on the market. Because of Engine Ice Hi-Performance Coolant's non-toxic phosphate-free formula, it's even safer for people and pets too!