Protects aluminum and all engine metals. Performance premium protection: -34 to 265 degrees F. Polar Antifreeze is an ethylene glycol base antifreeze with technologically advanced inhibitors which provide protection against freezing, overheating, rust and corrosion. It provides: superior protection for aluminum and all car and truck engine metals. Anti-boil protection for all air conditioned cars and vehicles under heavy duty service. Meets ASTM D-3306 and ASTM D-4985 requirements. Made in USA.