Red Line 80204 Water Wetter - 12 oz.Red Line Oils 80204 Water Wetter Cooling System Treatment 12 OZ. WaterWetter is a unique wetting agent for cooling systems which reduces coolant temperatures by as much as 30 degrees Farenheit . This liquid product can be used to provide rust and corrosion protection in plain water for racing engines, which provides much better heat transfer properties than glycol based antifreeze. Or it can be added to new or used antifreeze to improve the heat