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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
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).
Quantity
Documents
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
- 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
Manufacturer
Product Line
Industries
Authorized Countries
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.
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. Consisting of ~94% propylene glycol with a specially designed industrial corrosion inhibitor package, and the fluorescent dye supports faster leak detection during operation and maintenance.
DOWFROST™ HD is designed for wide operating conditions (including higher-temperature capability vs standard DOWFROST™ in many systems for HVAC and industrial heat transfer applications where low acute oral toxicity is preferred. Typical use includes chilled water and hydronic loops, geothermal systems, snow melt, cold storage secondary loops, and other closed-loop heat transfer applications.
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 HD when your system demands heavier-duty corrosion protection and industrial operating conditions, or when you want dyed fluid to support easier leak detection. If you require a food grade NSF H1 heat transfer fluid, you'll need to use DOWFROST™What concentration should I use?:
Concentration depends on your required freeze protection, operating temperatures, and system design.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
Features & Benefits
- Industrial-grade inhibited propylene glycol heat transfer fluid formulated for demanding systems
- Enhanced corrosion inhibitor package designed for industrial corrosion protection
- Fluorescent yellow-green dye to support easier leak detection
- Wide operating temperature capability (commonly cited up to ~325°F / ~160°C for the dyed product)
- Freeze protection and burst protection performance when properly diluted with water (selection depends on concentrations available in multiple concentrations including prediluted options for easier fills and fewer mixing errors
- ChemPoint supply and support model aligned to fast conversion needs and reliability-driven standardization
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
DOWFROST™ Glycol Thermal Fluids Articles
Dow DOWFROST™ Performance
Dow's glycol fluids stand apart in the heat transfer fluid industry due to their dynamic properties and a broad portfolio of specialized grades of DOWFROST™ and DOWTHERM™ with best in class performance.
Dowfrost Dan - Don't Burden Your Budget
Fiscal budgeting for facility maintenance is truly a tough balance. Too much or too little spending creates a domino-effect for unexpected issues, learn how to better budget with glycol fluids here.
Dowfrost Dan - Water Quality & Glycol
Water is a critical aspect for any glycol-based thermal fluid, the inherent properties of water allow for efficient and effective thermal transfer. But how does water quality affect performance and system equipment? Learn how water quality can affect your system and what you can do to prepare for long-term success.
DOWFROST Dan - Freeze and Burst Protection
Heat transfer systems are designed to recover, transfer, and retain heat – this is especially important for systems subjected to extreme cold weather. Learn how the Dow thermal fluids provide freeze and burst protection for winter weather environments.
Dow – Dowfrost – The True Cost of Homebrews
There are many glycol-based thermal fluids available in the market, but the so-called bargain homebrew solutions carry many hidden costs. Save yourself thousands in repair and fluid costs and learn the true value of the DOWFROST™ brands.
DOWFROST™ LC – Data Centers Cooling Solutions
Heat management in data centers is critical to ensure maximum lifespan and safe operation of the complex server banks. DOWFROST™ LC is the premier PG 25 solution for more cost-effective datacom liquid cooling systems – Learn more today ►
Dowfrost HD for Water Treatment
Glycol heat transfer fluids are an integral part of the temperature control processes in water treatment facilities - Learn more about the premium solutions from Dow here!
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