Cryo-TEK -100 anti-freeze for pumbing, cooling and heating systems. Use with the HUG Hydronics radiant in-floor heating system if chance floor may freeze.

Propylene Glycol AntiFreeze, 5 gallons

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Cryo-Tek 100

Hercules® Cryo-Tek™-100 Anti-Freeze is a ready to use 55% Virgin Propylene Glycol formula. It's designed for hydronic heating and cooling closed loop systems, in-floor heating that are at risk of freezing, most solar heating systems, snow melts, radiant heat and general plumbing systems.


  • Pre-mixed: Ready-to-use formula with 55% Virgin Propylene Glycol
  • Triple Protection Inhibitor stabilizes pH to prevent corrosion, chelates, hard water minerals and inhibits scale and sediment formation
  • Approved for use with copper, steel, iron, brass, PEX and elastomeric tubing
  • Not for use with galvanized, CPVC or aluminum
  • For heating systems requiring freeze protection, as well as corrosion prevention