As Pure as it can be made with all the protection you have come to trust. Cleanest coolant formulation in the water cooling industry. Just enough of what you need. * Designed for the user that wants the best overclocking temps without the need for crazy voodoo additives. Pre-Mixed. Pre-Dyed and Ready to add to your system. * Safe on all plastics, rubbers, and miscellaneous gasket materials, including Acrylic. Environmentally responsible food safe NON-TOXIC biodegradable product-good for you, good for your PC, and good for the planet. * Specially formulated for high flow pumps, not prone to mechanical sheering and excellent lubrication properties to increase pump life. * PrimoChill does NOT use Ethylene Glycol in any fluid. Water Based (not designed for sub zero temps), 2 year shelf life, (unopened)