Designed for heavy-duty diesel engines which use more than 33% antifreeze or a supplemental corrosion package Similar properties and benefits to regular Water Wetter but lacks rust and corrosion inhibitors Diesel road cars and light trucks (equipped with Cummins Duramax and Power Stroke engines) should use regular Water Wetter to ensure proper rust and corrosion protection Typical diesel commercial vehicle requires one bottle treats up to 15 gallons Reduces or eliminates bubbles or vapor barrier that form on hot metal surfaces to reduce coolant temperatures by up to 20 Superior heat transfer properties compared to glycol-based anti freeze Compatible with new or used antifreeze (including DEX-COOL and long-life versions) to improve the heat transfer of ethylene and propylene glycol systems Improves heat transfer and reduces cylinder head temperature Designed for use with all modern aluminum cast iron copper brass and bronze cooling systems Cleans and lubricates water pump seals Reduces cavitation and complexes with hard water to reduce scaling Does not lower cooling system below the thermostatically-controlled temperature.