Hercules® Cryo-Tek™ 30 gal -100 Antifreeze is a ready to use 55% 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.
