Ironside UV Reactant PC Liquid Coolant (1 quart 1000mL) Plasma Purple Only product on market made with Double-distilled water (abbreviated "ddH2O", "Bidest. water" or "DDW") New Improved Dye just added for better UV Reactive Glow Corrosion Inhibitors Contains surfactants, unique agents for cooling systems that doubles the wetting ability of water and intensifies heat transfer abilities. No Glycol added (resulting in better thermal transfer)