Peak Antifreeze & Coolant is a specially formulated, high performance coolant compatible with all conventional antifreezes and coolants. It provides freeze-up protection to -84 degrees F and boil-over protection to 276 degrees F, and protects against rust and corrosion. Peak Antifreeze & Coolant meets or exceeds all major conventional automotive performance and protection specifications. The coolant will protect all metals used in cooling systems, including aluminum. Keep your engine safe, while providing optimum cooling, with Peak Antifreeze & Coolant.