Heat Transfer Fluid

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Most heat transfer oil will transfer heat with some degree of efficiency, but what really makes the difference is how long heat transfer oil lasts and how clean it keeps your system.

Our heat transfer oil starts with various extremely stable, naturally resilient base stocks like highly refined, severely hydro treated paraffinic oils and pure silicones. While most heat transfer oils stop there, ours are enhanced with a proprietary blend of additives that ensure long-term, trouble-free operation for all heat transfer applications. Read more in our heat transfer oil comparison report.

Longer Lasting and Cleaner Running Heat Transfer Oil – Guaranteed. read more about our heat transfer oil risk-free trial

High temperature fluids

Heat Transfer Fluid Optimal Temperature Range Fluid Type Flashpoint Application Quick Links
Duratherm 600

250ºF - 600ºF

121ºC - 315ºC

Paraffinic 435ºF High Oxidation Resistance For any systems open to the atmosphere (plastic processing etc.) Data Sheet
MSDS
Prop vs Temp
Duratherm 630

300ºF - 630ºF

148ºC- 332ºC

Paraffinic 444ºF High Temp.High oxidation resistance prescribed For apps above 600ºF Data Sheet
MSDS
Prop vs Temp
Duratherm 450

30ºF - 450ºF

-1ºC- 232ºC

Paraffinic 302ºF Heating & Cooling Good Low Temperature Thermal Properties Data Sheet
MSDS
Prop vs Temp
Duratherm G

175ºF - 500ºF

79ºC- 260ºC

Polyalkylene
Glycol
511ºF Compatible and upgrade to Ucon 500 Data Sheet
MSDS
Prop vs Temp

High flashpoint fluids

Heat Transfer Fluid Optimal Temperature Range Fluid Type Flashpoint Application Quick Links
Duratherm G

175ºF - 500ºF

79ºC- 260ºC

Polyalkylene
Glycol
511ºF Compatible and upgrade to Ucon 500 Data Sheet
MSDS
Prop vs Temp
Duratherm HF

300ºF - 640ºF

148ºC- 338ºC

Paraffinic 530ºF Meets high flash point requirements Data Sheet
MSDS
Prop vs Temp
Duratherm S

-40ºF - 650ºF

-40ºC- 343ºC

Silicone 615ºF Highest Oxidation Resistance Specialty Applications Data Sheet
MSDS
Prop vs Temp

Low temperature fluids

Heat Transfer Fluid Optimal Temperature Range Fluid Type Flashpoint Application Quick Links
Duratherm XLT-50

-50ºF - 350ºF

-45ºC - 176ºC

Hydrocarbon
Blend
210ºF Precise temperature control for low temperature -50ºF up to 350ºF Data Sheet
MSDS
Prop vs Temp
Duratherm XLT-120

-120ºF - 150ºF

-84ºC - 65ºC

Hydrocarbon
Blend
120ºF Precise temperature control for extreme low temperature -120ºF up to 150ºF Data Sheet
MSDS
Prop vs Temp

Open bath fluids

Heat Transfer Fluid Optimal Temperature Range Fluid Type Flashpoint Application Quick Links
Duratherm G

175ºF - 500ºF

79ºC- 260ºC

Polyalkylene
Glycol
511ºF Compatible and upgrade to Ucon 500 Data Sheet
MSDS
Prop vs Temp
Duratherm S

-40ºF - 650ºF

-40ºC- 343ºC

Silicone 615ºF Highest Oxidation Resistance Specialty Applications Data Sheet
MSDS
Prop vs Temp

Fluids for batch processing requiring both heating and cooling cycles

Heat Transfer Fluid Optimal Temperature Range Fluid Type Flashpoint Application Quick Links
Duratherm LT

-30ºF - 600ºF

-34ºC- 315ºC

Synthetic
Hydrocarbon
329ºF Wide Process Temp. Ranges Heating and Cooling From -30ºF to 600ºF Data Sheet
MSDS
Prop vs Temp
Duratherm S

-40ºF - 650ºF

-40ºC- 343ºC

Silicone 615ºF Highest Oxidation Resistance Specialty Applications Data Sheet
MSDS
Prop vs Temp

Special needs (i.e.food grade)

Heat Transfer Fluid Optimal Temperature Range Fluid Type Flashpoint Application Quick Links
Duratherm FG

300ºF - 620ºF

148ºC- 326ºC

Paraffinic 440ºF Food Grade Applications Data Sheet
MSDS
Prop vs Temp
Duratherm LITE

300ºF - 600ºF

148ºC- 315ºC

Paraffinic 435ºF Ideal for leaky systems or those requiring frequent top ups Data Sheet
MSDS

View complete comparison chart

Heat Transfer Fluid Optimal Temperature Range Fluid Type Flashpoint Application Quick Links
Duratherm 600

250ºF - 600ºF

121ºC - 315ºC

Paraffinic 435ºF High Oxidation Resistance For any systems open to the atmosphere (plastic processing etc.) Data Sheet
MSDS
Prop vs Temp
Duratherm 630

300ºF - 630ºF

148ºC- 332ºC

Paraffinic 444ºF High Temp.High oxidation resistance prescribed For apps above 600ºF Data Sheet
MSDS
Prop vs Temp
Duratherm 630

300ºF - 630ºF

148ºC- 332ºC

Paraffinic 444ºF High Temp.High oxidation resistance prescribed For apps above 600ºF Data Sheet
MSDS
Prop vs Temp
Duratherm 450

30ºF - 450ºF

-1ºC- 232ºC

Paraffinic 302ºF Heating & Cooling Good Low Temperature Thermal Properties Data Sheet
MSDS
Prop vs Temp
Duratherm HF

300ºF - 640ºF

148ºC- 338ºC

Paraffinic 530ºF Meets high flash point requirements Data Sheet
MSDS
Prop vs Temp
Duratherm FG

300ºF - 620ºF

148ºC- 326ºC

Paraffinic 440ºF Food Grade Applications Data Sheet
MSDS
Prop vs Temp
Duratherm G

175ºF - 500ºF

79ºC- 260ºC

Polyalkylene
Glycol
511ºF Compatible and upgrade to Ucon 500 Data Sheet
MSDS
Prop vs Temp
Duratherm S

-40ºF - 650ºF

-40ºC- 343ºC

Silicone 615ºF Highest Oxidation Resistance Specialty Applications Data Sheet
MSDS
Prop vs Temp
Duratherm XLT-50

-50ºF - 350ºF

-45ºC - 176ºC

Hydrocarbon
Blend
210ºF Precise temperature control for low temperature -50ºF up to 350ºF Data Sheet
MSDS
Prop vs Temp
Duratherm XLT-120

-120ºF - 150ºF

-84ºC - 65ºC

Hydrocarbon
Blend
120ºF Precise temperature control for extreme low temperature -120ºF up to 150ºF Data Sheet
MSDS
Prop vs Temp
Duratherm LT

-30ºF - 600ºF

-34ºC- 315ºC

Synthetic
Hydrocarbon
329ºF Wide Process Temp. Ranges Heating and Cooling From -30ºF to 600ºF Data Sheet
MSDS
Prop vs Temp
Duratherm LITE

300ºF - 600ºF

148ºC- 315ºC

Paraffinic 435ºF Ideal for leaky systems or those requiring frequent top ups Data Sheet
MSDS