Red Line Diesel WaterWetter Coolant Additive - Universal

Red Line Oil
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Diesel WaterWetter reduces or eliminates bubbles or vapor barrier that form on hot metal surfaces to reduce coolant temperatures by up to 20°. It has superior heat transfer properties compared to glycol-based antifreeze and improves the heat transfer of ethylene and propylene glycol systems. Diesel WaterWetter also provides excellent protection from erosion in the water pump and cylinder head. As a benefit, Diesel WaterWetter provides excellent control of foam with water alone and glycol solutions.


  • Diesel road cars and light trucks (equipped with Cummins, Duramax, and PowerStroke engines) should use regular WaterWetter to ensure proper rust and corrosion protection.
  • Use Red Line Diesel WaterWetter at the rate of 1% in an ethylene glycol or propylene gylcol antifreeze solution. One 15 ounce bottle treats 10 - 15 gallons of coolant.



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