If you operate mission-critical thermal loops where uptime matters, DOWFROST™ HD is built for the realities of industrial and power environments: corrosion risk, temperature swings, mixed metallurgy, and long run times between maintenance windows.

If you operate mission-critical thermal loops where uptime matters, DOWFROST™ HD is built for the realities of industrial, HVAC, and data center environments: corrosion risk, temperature swings, mixed metallurgy, and long run times between maintenance windows. For operators maintaining primary cooling infrastructure, it is a strong fit for closed-loop systems where fluid reliability, equipment protection, and service life all matter.

DOWFROST™ HD is a heat transfer fluid formulated with an elevated corrosion inhibitor package to protect system metals and help extend equipment life in closed-loop systems. It consists of approximately 94% propylene glycol and a specially designed industrial corrosion inhibitor package, while its fluorescent dye supports faster leak detection during operation and maintenance. It is also available in package sizes that support different purchasing and maintenance needs, from smaller-volume service requirements to larger bulk supply programs for facility and plant operations.

DOWFROST™ HD is designed for wide operating conditions, including higher-temperature capability than standard DOWFROST™ in many systems, for HVAC and industrial heat transfer applications where low acute oral toxicity is preferred. Typical uses include chilled water and hydronic loops, geothermal systems, snow melt, cold storage secondary loops, and other closed-loop heat transfer applications. In data centers, DOWFROST™ HD should be the go-to fluid for primary cooling HVAC loops, where dependable heat transfer and closed-loop corrosion protection are essential to keeping central plant infrastructure operating efficiently. For direct-to-chip cooling, DOWFROST™ LC is the better fit, while DOWFROST™ HD remains the right choice for the facility-side primary cooling loop.

Frequently Asked Questions

What is DOWFROST™ HD?
A heavy-duty, inhibited propylene glycol heat transfer fluid formulated with an industrial corrosion inhibitor package and a fluorescent dye for leak detection.

When should I choose DOWFROST™ HD vs. standard DOWFROST™?
Choose DOWFROST™ HD when your system demands heavier-duty corrosion protection, operates in demanding industrial environments, or when dye-enhanced leak detection is beneficial. If you require a food-grade NSF H1 heat transfer fluid, standard DOWFROST™ is typically the more appropriate choice.

What concentration should I use?
The appropriate concentration depends on your required freeze protection level, operating temperature range, and overall system design. Consult the DOWFROST™ HD product specifications or contact a technical specialist to determine the recommended concentration for your application.