Inhibited ethylene glycol concentrate

DOWTHERM SR-1 Alternative

An inhibited ethylene glycol concentrate, plus ready-mixed premixes, for the same chiller, HVAC and process loops. Blended and shipped from Taylor, Texas, with a certificate of analysis on every lot.

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01

The short answer

Quick answer

DOWTHERM SR-1 is Dow's inhibited ethylene glycol concentrate (about 95.5% EG) with a phosphate-based, silicate-free inhibitor, dyed for leak detection. Our 100% Ethylene Glycol Inhibited is an ethylene glycol concentrate for the same chiller, HVAC and process loops, and we also sell it ready-mixed at 30% to 50%. Our inhibitor is a nitrite-containing hybrid organic-acid package and the fluid is undyed, so it is an alternative, not an identical fluid.

Industrial chiller plant and dry coolers on a concrete pad with Alliance Chemical IBC totes and a pallet of ethylene glycol drums
02

What to order

The products that fit this spec, and what each one is for.

Concentrate

100% Ethylene Glycol Inhibited

Inhibited ethylene glycol concentrate for site blending with deionized water. Pails, drums and IBC totes.

Quart to 330-gallon tote · COA with every lot

See sizes and pricing Technical data sheetSafety data sheet
Ready-mixed 50/50

Inhibited Ethylene Glycol 50/50 with OAT-908

-34.6 °FFreeze point
typical · -34.6 °F max · 50 vol% ethylene glycol

50% ethylene glycol already blended with deionized water and inhibitor, for outdoor and freeze-exposed loops.

Quart to 330-gallon tote · COA with every lot

See sizes and pricing Technical data sheetSafety data sheet
Ready-mixed 40/60

Inhibited Ethylene Glycol 40/60 with OAT-908

-12.6 °FFreeze point
typical · -12.6 °F max · 40 vol% ethylene glycol

40% ethylene glycol premix for chillers and dry coolers that do not need 50% protection.

Quart to 330-gallon tote · COA with every lot

See sizes and pricing Technical data sheetSafety data sheet

Need a different concentration? We blend to the freeze point you specify, in pails, drums and 275- or 330-gallon totes.

03

About DOWTHERM SR-1

What Dow and its distributors publish about the fluid.

GlycolEthylene glycol concentrate, about 95.5% by weight
InhibitorPhosphate-based industrial inhibitors, silicate-free
ColorDyed fluorescent pink for leak detection
UseDiluted with water for chillers, HVAC and process cooling

Source: Dow DOWTHERM SR-1 specification (with distributor specification sheets).

04

Side by side

DOWTHERM SR-1 compared with our 100% Ethylene Glycol Inhibited

Property DOWTHERM SR-1 (published) Alliance 100% EG Inhibited Comparison
Glycol
Ethylene glycol
Ethylene glycol
Same
Form
Concentrate, about 95.5% EG
Concentrate, 98 to 100% EG by weight including under 2% inhibitor
Same
Inhibitor
Phosphate-based
Nitrite-containing hybrid organic-acid package
Different
Dye
Fluorescent pink
Undyed
Different
Ready-mixed option
Separate premix products
30/70, 35/65, 40/60 and 50/50 premixes with deionized water
Same

Our column comes from our controlled technical data sheet and SDS. Their column comes from published sources; we do not test competitor fluids.

05

Questions

Is there a DOWTHERM SR-1 equivalent?

Several suppliers sell inhibited ethylene glycol concentrates for the same loops. Ours is an alternative with a different inhibitor package (nitrite-containing hybrid organic acid, undyed), not an identical fluid, so check it against your system's fluid specification.

Can I mix your ethylene glycol with DOWTHERM SR-1 already in the loop?

No. Do not mix inhibitor chemistries. Drain, flush with deionized water and refill.

Why buy a premix instead of concentrate?

A premix arrives at the right strength, blended with deionized water, so there is no risk of mixing with tap water or getting the ratio wrong on site.

Is it dyed?

No, it is clear and undyed.

Quote a fill

Pricing, freight and lead time for your site

Tell us where the coolant goes, how much, and when it has to be there.

  • Priced for your volume, from pails to 330-gallon totes
  • Freight to your site from Taylor, Texas
  • Blended to the freeze point you specify, COA with every lot

Prefer to talk? (512) 365-6838

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DOWFROST, DOWTHERM and DOWCAL are trademarks of The Dow Chemical Company or an affiliated company. Alliance Chemical is not affiliated with Dow, and our products are not Dow products. Comparisons use Dow's and its distributors' published information; confirm against the current data sheets and your system's fluid specification before switching.