Check the listing for details. Evans Racing Prep Fluid w/ Dye Added ( 1 ) One Gallon EC42001. Condition: New. Listed at 31.97 USD. Description Conversion fluid flush for all engines. Evans Prep Fluid is a waterless cooling system flush engineered specifically to purge the cooling system of water-based antifreeze after draining and before installing new waterless coolant. Prep Fluid should be used when block drains are unavailable or cannot be removed. It is not a substitute for thoroughly draining the cooling system and related components. Prep Fluid is NOT intended to be a stand-alone operating coolant, but as a flush only. For use with all engines being converted to any Evans waterless coolant, after draining 50-50 coolant from the cooling system. Evans Prep Fluid is ready to use?no water required. Hygroscopically absorbs water. Ensures all residual water is removed from the system. Ensures that Evans coolants will meet the water content limits and provide peak performance. Protects cooling system metals during flush. Gallon. A waterless cooling system flush, engineered specifically to purge the cooling system of water-based antifreeze after draining and before installing Evans Waterless CoolantHygroscopically absorbs waterEnsures all residual water is removed from the systemEnsures that Evans coolants will meet the water content limits and provide peak performanceProtects cooling system metals during flushMade in USA