PrimoChill Ice Water Cooling Coolant- Invisible Blue (32oz.) Specially formulated with excellent lubrication properties to increase pump life. Special corrosive inhibiting ingredients to prevent sludge build up and galvanic corrosion Safe on all plastics, rubbers, and miscellaneous gasket materials. Environmentally responsible food safe non toxic biodegradable productgood for you, good for your PC, and good for the planet. Formulated for high flow pumps and is not prone to mechanical sheering