Hercules® Cryo-Tek™ 5 AG Antifreeze is a ready to use 95% Virgin Propylene Glycol formula. It's designed for hydronic heating and cooling closed loop systems, most solar heating systems, snow melts, radiant heat and general plumbing systems. Behold the power of Hercules®, products built to last and trusted by plumbers to withstand even the toughest conditions.

• Blend of 95 percent virgin propylene glycol
• The triple protection inhibitor stabilizes pH to prevent corrosion, chelates, hard water minerals, and inhibit scale and sediment formation
• Not for use with galvanized, CPVC or aluminum
• Used in systems fabricated with metal, plastics and rubber piping, fittings, seals and other parts
• For heating systems requiring freeze protection as well as corrosion prevention
• Cryo-Tek is “GRAS” (Generally Recognized As Safe) for incidental contact with food
• For warranty product details, refer to the Oatey limited Warranty document