 Specifically designed to match the technology and color requirements for your specific vehicle, Peak OET Antifreeze Plus Coolant delivers excellent protection against rust and corrosion to all cooling system metals, including aluminum. Each coolant is formulated with the same corrosion inhibitor technology that protected your vehicle right from the factory. You can find out more at peakauto.com. KCO fights the most difficult coolant leaks, including head gaskets and engine blocks.