If you are looking for dependable horsepower right out of the bottle, then this high-performance coolant is for you. Comes premixed and is in a convenient 1/2 gallon bottle. Coolant reduces operating temperatures by as much as 50° F. Maintains optimum operating temperature and reduces power loss from excess heat Biodegradable, phosphate-free, and non-toxic propylene glycol based antifreeze and coolant Features boil over protection up to 256° F and offers freeze protection to -26° F Meets or exceeds all ASTM and SAE standards Safe for aluminum and most other metals