What is Inhibited Propylene Glycol?
Inhibited propylene glycol is a heat transfer fluid formulated with corrosion inhibitors to protect HVAC, hydronic heating, geothermal, and food-safe industrial systems from freezing, corrosion, and scale buildup.
Unlike uninhibited glycol, inhibited formulations help extend equipment life by protecting contaminant metals such as steel, copper, brass, and aluminum while maintaining reliable thermal performance. Compared to ethylene glycol-based heat transfer fluids, propylene glycol offers a lower toxicity alternative, making it a preferred choice for applications where environmental safety or incidental contact may be a concern.
Why Dynafrost for Inhibited Propylene Glycol Applications?
Dynafrost is a premium inhibited propylene glycol heat transfer fluid designed for long-term system protection in demanding commercial and industrial applications. Its biodegradable formulation provides dependable freeze protection and corrosion resistance while supporting safer, more environmentally responsible system operation.
Dynafrost’s recommended temperature range is -51oC to 120oC. This product comes in a variety of concentrations based on your needs. Please note that this product is designed to protect aluminum components up to 65°C
Product Features
- Formulated using the highest quality virgin propylene glycol
- Premium corrosion inhibitor package to protect system metals
- Non-toxic inhibited propylene glycol based heat transfer fluid
- Readily biodegradeable
- Built for cold climate use with a freeze point as low as -51oC
Applications Include
Ideal for In-Floor Heating, HVAC & Closed Loop Systems:
Dynafrost is commonly used in:
- radiant in-floor heating systems
- hydronic heating loops
- HVAC systems
- geothermal applications
- chilled water systems
- industrial heat transfer systems
*Generally, for an extended margin of protection, you should select a solution temperature that is at least 3°C (5°F) lower than the expected lowest ambient temperature.
**Inhibitor levels should be adjusted for solutions of less than 30% glycol.
Available Packaging
20L Pail
205L Drum
1000L Tote
FAQ
Why use inhibited glycol instead of regular propylene glycol?
Regular (uninhibited) propylene glycol helps prevent freezing but does not provide long-term corrosion protection.
Inhibited glycol adds protective chemistry that helps extend equipment life and maintain system efficiency.
What is inhibited propylene glycol used for?
Common applications include:
- in-floor radiant heating
- HVAC systems
- geothermal systems
- chilled water loops
- industrial heat transfer systems
Is inhibited propylene glycol safe for hydronic heating systems?
Yes. It is widely used in closed-loop hydronic and radiant heating systems to provide freeze protection and corrosion resistance.
How long does inhibited propylene glycol last?
Service life depends on operating conditions and maintenance, but properly maintained inhibited glycol can provide years of reliable performance.
Is Dynafrost safe to use in systems containing aluminum components?
While Dynafrost is an industry-leading, phosphate-based inhibitor package designed for superior protection in standard ferrous (iron and steel) heating systems, it is not optimized for systems featuring aluminum heat exchangers. For modern, multi-metal hydronic loops that include aluminum, we recommend our specialized DynaGuard Phosphate-Free Glycol, which is engineered specifically for elite corrosion protection across all aluminum and non-ferrous alloys.
How do I know if my system requires Propylene Glycol or Ethylene Glycol?
Propylene Glycol is required for food-safe environments, institutional buildings, and low-toxicity risk mitigation. However, if your loop is strictly isolated from potable water—such as a gas processing plant or heavy industrial chiller—switching to industrial inhibited ethylene glycol solutions delivers higher thermal conductivity and reduces ongoing pumping power.
To compare viscosity curves, freeze protection, and system compatibility, read our commercial HVAC glycol fluid selection guide. Looking for ethylene glycol-based heat transfer fluids? Explore our Dynatherm Heat Transfer Fluid solutions, and our Global Extended Life HD HOAT Coolant.
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