Responsive image


A formulation of ethylene glycol that features one of the highest maximum use temperature of any glycol, operating temperature ranges -60F to 350F. The fluid is dyed fluorescent orange to aid in leak detection.




Product Overview

DOWTHERM 4000 inhibited ethylene glycol (EG) is comprised of about 92% EG and 8% corrosion inhibitors and has a bright fluorescent orange color. The lower EG content allows for a higher concentration of corrosion inhibitors which in turn means DOWTHERM 4000 is capable of operating at higher temperatures than DOWTHERM SR1 i.e. from -20 F to 350 F. This makes DOWTHERM 4000 a higher end, niche type product which is also capable of providing freeze protection down to -60 F.


• Heating, Ventilation & Air Conditioning (HVAC)
• Chill water & hydronic heating loops
• Geothermal (ground source heat pumps)
• Snow melt & Turf heating systems
• Solar hot water heating
• Fire water sprinkler systems
• Refrigeration
• Ice skating rinks
• Cold storage, refrigerated warehouses & supermarkets
• (secondary loop)
• Thermal Energy Storage (TES)

Product Specifications

-Ethylene glycol-based fluid (92%)
-Fluorescent orange
-Increased concentration of inhibitors
-Efficient heat transfer
-Operating range: -20 to 350° F for heat transfer
-60° F for burst protection

Primary Chemistry: ethylene glycol

Related Products

DOWTHERM™ Glycol Thermal Fluids

DOWTHERM™ inhibited glycol-based fluids are specially formulated with heavy-duty industrial inhibitor packages that prevent corrosion. The inhibitors are easily maintained, long lasting and replenishable, which means intervals between fluid changeouts are extended and fluid expense is minimized.

Dow offers one of the industry's widest range of ethylene glycol (EG) fluids addressing customers’ broad range of application/performance and environmental criteria.

Available in concentrates and various blends, please inquire for more details.

» Learn more about Dow Heat Transfer Fluids

Talk to an Expert

ChemPoint has experience product specialists on staff to provide our customers support in finding the right solution for their project. Talk to us, we can help.

Call us: 425.372.9464

Ask a Question Get a Quote Request a Sample