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DOWTHERM SR 1 Inhibited Ethylene Glycol in a 5 Gallon Pail.
DOWTHERM SR 1 Inhibited Ethylene Glycol in a 5 Gallon Pail.
5 gallon tight head container with integrated handle.
The fluid is dyed fluorescent pink to aid in leak detection.
Go Glycol Pros warehouse facility.

DOWTHERM SR-1 Inhibited Ethylene Glycol in 5 Gallon Pail

This high purity ethylene glycol based antifreeze is mixed with purified, deionized water at our in-house facility.

Our glycol concentration ranges from 25% to 60% and 100% concentrated DOWTHERM solution. Contact us to request a custom premix. 

Concentration (Percentage Glycol): 25%
Availability: In Stock. Ready to Ship.
Select your concentration to view its price!
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Frequently Bought Together

Need help determining your required concentration?: Try our helpful glycol calculator tools!


25%-100% DOWTHERM™ SR-1 ethylene glycol heat transfer fluid includes a specially designed package of industrial corrosion inhibitors

Solutions have an operating temperature range of -60° F to 250° F (-51° C to  121° C), and the glycol fluid is dyed fluorescent pink to aid in leak detection.

Dow® ethylene glycol-based fluids are less viscous than propylene glycols. Therefore, they generally provide superior heat transfer efficiency and better low temperature performance. However, in applications where toxicity is a concern, propylene glycols are preferred. 

Container Specifications

This tight head, rectangular container comes with a fixed handle. Our pails are specially designed to allow for mess-free pouring direct from the pail. No need for pumps or siphons! For more container specifications, click here.

View all available container sizes.

Custom Mix Concentrations

Our heat transfer specialists can also custom mix concentrations to your specifications. Contact us to request a custom premix.

Bulk Propylene Glycol Available

We offer bulk tanker delivery and installation on 2,500 gallons or more. Contact us for a quote today.

Do the job right the first time

Why choose glycol in HVAC systems for heat transfer? Learn more about the most dependable heat transfer fluid, propylene and ethylene glycols.

Why choose Dow heat transfer fluid? Read about The Dow Advantage. Dow's high purity glycol-based fluids can last 20 years or more with proper maintenance. 

Dow customers receive a free comprehensive heat transfer fluid analysis annually. Register to begin receiving your yearly glycol testing kit. 


  • Physical State: Liquid
  • Ethylene Glycol Color: Fluorescent Pink
  • Total Weight (in pounds): Between 45 - 49 lbs. per pail
  • pH of Solution (50% glycol): 9.0-10.5
  • Composition (% by Weight):
    - Ethylene Glycol: 95.4%
    - Inhibitors and Water: 4.6%
  • Specific Gravity: 1.122-1.132
  • Reserve Alkalinity: 12.0 ml
  • Applications: HVAC System Freeze, Burst and Corrosion Protection, Snowmelt, Geothermal and Solar Heating



HVAC System Freeze, Burst and Corrosion Protection, Snowmelt, Geothermal and Solar Heating

Dowtherm SR-1 Safety Data Sheets

Common Questions

What concentration of glycol do I need? What is the freeze point or burst point of propylene glycol?
How many gallons of glycol do I need to correct or balance my concentration?
How many containers do I need? What size is best?
See all frequently asked questions

You can find all of our most commonly asked questions on our FAQ Page - See all frequently asked questions