TRUEGARD-Propylene Glycol Inhibited-Heat Transfer Fluid 100% Concentrate - 55 Gallon Drum

Because this is a full-strength concentrate, it must be blended with water before use in most systems. The appropriate glycol-to-water ratio depends on the freeze protection needed for your climate and system type - for example, hydronic heat pump systems typically require a 20-40% propylene glycol mix to protect against burst pipes and heat exchanger damage. Consult the product data sheet for concentration-versus-freeze-point guidance.

Propylene glycol is preferred wherever low toxicity is a priority, such as food and beverage processing, HVAC systems in occupied buildings, or any application where incidental human or animal contact is possible. Ethylene glycol offers similar heat transfer performance but carries a higher toxicity profile, making propylene glycol the safer choice for those sensitive environments.

An inhibited fluid contains a package of industrial corrosion inhibitors that protect the metal components in your system - including pipes, heat exchangers, and pumps - from rust and corrosion over time. Without these inhibitors, undiluted or uninhibited glycol can become acidic and degrade system hardware, so the inhibitor package is essential for long-term system health.

At 100% concentration the fluid offers freeze protection down to -60°F and can handle process temperatures up to 250°F, but the practical pumping/operating range narrows as the fluid thickens at very low temperatures. Once diluted, the freeze point rises proportionally with decreasing glycol percentage, so selecting the right mix ratio for your lowest expected ambient temperature is critical to preventing system damage.

The pink dye is added solely for leak detection, making it easy to spot glycol escaping from fittings, seals, or heat exchangers during inspection. It is a standard identification dye and does not affect the fluid's thermal or inhibitor performance.

Propylene glycol's low-toxicity profile makes it the industry-standard choice for food and beverage heat transfer, and the product data lists food and flavoring heat transfer among its key applications. For systems requiring specific regulatory compliance (such as NSF or USDA authorization), review the product data sheet and Safety Data Sheet to confirm the formulation meets your facility's requirements before use.