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A formulation of ethylene glycol that features one of the highest maximum use temperature of any glycol, operating temperature ranges -60°F to 350°F. 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.

Product Specifications

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

Features & Benefits

Wide-temperature range operability


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
Ice skating rinks
Cold storage, refrigerated warehouses & supermarkets (secondary loop)
Thermal Energy Storage (TES)

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 replenish-able, which means intervals between fluid changeouts are extended and fluid expense is minimized.

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