Chevron HTF P-150 is an inhibited propylene glycol used as a heavy duty industrial coolant and heat transfer agent. The inhibitor system is designed to protect brass, copper, solder, steel, cast iron, aluminum, and other metals commonly found in industrial cooling and heating systems. A foam inhibitor is included to minimize foaming tendencies during service. Chevron HTF P-150 coolant is recommended as a coolant in stationary engines, in applications such as natural gas processing, irrigation, power generating systems, oil field operations, and portable air compressors. Chevron HTF P-150 should not be used in automotive or non-stationary heavy duty diesel applications.