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- Manufacturer: Dow
- Product Line: DOWFROST™ Glycol Thermal Fluids
- Product: DOWFROST™ Propylene Glycol Thermal Fluids
- Industries: Adhesives | Facility Infrastructure | Maintenance, Repair, Overhaul | Metal Processing & Fabrication | Water Treatment
- Authorized Countries: Canada | Mexico | United States
DOWFROST™ HD
Fulfilled By ChemPoint
SKU
0124586
DOWFROST™ HD is a heavy-duty, inhibited propylene glycol (PG) heat transfer fluid designed for demanding closed-loop heating and cooling systems that need strong corrosion protection, reliable freeze protection, and long fluid life. It is fluorescent yellow-green for easier leak detection. Suitable for heat transfer applications between −45°C and 160°C (−50°F and 325°F).
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Specifications
Product type: Inhibited propylene glycol
Color: Green-yellow
Propylene glycol–based fluid
pH of solution (50% glycol): 9.5–10.5
Reserve alkalinity (min): 15.0 ml
Specific gravity (60/60°F): 1.053–1.063
Operating temperature range: 0°F to 325°F for heat transfer
Burst protection: Down to −60°F
Primary Chemistry:
Propylene glycol
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Conor Robertson, Technical Specialist
Product recommendations backed by technical expertise.
Fast answers to formulation and application questions.
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Canada
Mexico
United States
Overview
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.
Features & Benefits
- Industrial-grade fluid for demanding systems:
- Formulated inhibited propylene glycol heat transfer fluid helps support reliable thermal performance in tough industrial service conditions.
- Corrosion protection that helps extend equipment life:
- An enhanced inhibitor package is designed to protect metal surfaces and reduce corrosion-related maintenance concerns across the system.
- Faster leak identification in the field:
- A fluorescent yellow-green dye makes leaks easier to spot during inspections, helping maintenance teams troubleshoot issues sooner.
- Broad operating temperature capability:
- Designed for applications that require dependable performance across a wide temperature range, commonly cited up to approximately 325°F / 160°C for the dyed product.
- Freeze and burst protection when properly diluted:
- When mixed with water at the right concentration, the fluid helps protect systems against freeze damage and burst risk, supporting uptime in colder operating environments.
- Flexible concentration options for easier handling:
- Available in multiple concentrations, including prediluted options, to simplify fills, reduce mixing errors, and support more consistent system preparation.
Problems Solved
Repeated corrosion issues in closed-loop systems (rust formation, under-deposit corrosion risk, metal loss, premature leaks) where inhibitor performance matters.
Freeze-related downtime and damaged equipment from seasonal temperature swings in outdoor or exposed piping, rooftop equipment, and remote loop segments.
Inconsistent maintenance outcomes caused by fluid degradation over time in higher-stress industrial loops.
Slow troubleshooting when leaks are hard to find (dye-supported leak detection helps reduce hunt time).
“Price per gallon” purchasing decisions that ignore total cost of ownership (repeat repairs, unplanned outages, flush-and-fill costs, lost productivity).
Applications
DOWFROST™ HD is an ideal thermal fluid for a wide range of heat transfer applications across various industries, including:
Industrial HVAC chilled water loops
Hydronic heating loops
Large-scale chiller systems
Geothermal (ground source heat pumps)
Snow melt and turf heating systems
Solar hot-water heating
Cold storage and refrigerated warehouses (secondary loop)
Supermarkets and refrigeration secondary loops
Thermal energy storage (TES) systems
Water treatment facility heat transfer loops
Related Applications
Facility Infrastructure
- Air Preheating
- Beverage Packaging
- Blow Molders
- Boilers
- Chillers
- Cooling Towers
- Facility Management
- Heat Exchangers
- Heat Transfer Skids
- HVAC
- Immersion Cooling
- Immersion Freezing
- Mechanical Contractors
- Plastics Forming
- Power Cogeneration
- Radiant Heating
- Secondary Chill Loops
- Shell & Tube
- Snow Melt
- Solar Hot Water Heating
- Vaporizers
- Waste Heat Recovery
Related CAS Numbers
Water Treatment
Related Chemistries
Adhesives
Facility Infrastructure
Water Treatment
Related End Markets
Facility Infrastructure
- Energy Generation & Utility
- Facility Construction & Management
- Maintenance, Repair & Operations
- Medical & Pharmaceutical
- Chemical & Petrochemical
- Facility Infrastructure
- General Industrial
- Heavy Industry
- Oil & Gas
- Personal Care
Related Functions
Adhesives
Facility Infrastructure
Maintenance, Repair, Overhaul
Metal Processing & Fabrication
Water Treatment
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