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Thermal fluids for almost every
application from -84°C to 337°C
(-120°F to 640°F)
Fast Shipping Safer and Cleaner Unparalleled Service Longer Lasting
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Quick find your
thermal fluid:

°F°C

Unparalleled Service

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  • Fast shipping
  • Free lifetime fluid analysis
  • Expert technical support
  • System troubleshooting
  • Full engineering data

Our Products

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Technical Support

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  • 25+ years experience
  • Team of PhD chemists and engineers
  • OEM engineering support
  • Extensive OEM partnerships
  • State of the art test equipment
  • Extensive library of white papers

Some of the longest lasting and safest
thermal fluids on the market

The report below shows Duratherm’s superior resistance to oxidation, the main
cause of sludge buildup and fluid degradation

Engineered for applications from -84°C to 337°C
(-120F to 640°F)

Our exclusive additive system delivers unparalleled protection and service life with superior thermal stability and resistance to oxidation compared to other industry fluids. Duratherm’s food grade fluids are NSF, FDA certified and most all of our fluids are non-toxic and non-hazardous. Duratherm’s fluids are manufactured under the strictest ISO protocols providing ultimate workplace safety and efficiency.

Sometimes Less is More!

Lower TAN and less viscosity change means longer service, higher performance and no sludge!

Duratherm 450,
600, 630 HF & LT

0.1
0%

Duratherm G

0.1
0%

Momar™
ISO 46 SYN

0.3
12%

Calflo™
AF

0.4
8%

Paratherm
OR®

0.4
10%

Multitherm
OGI®

0.5
16%

Mobiltherm
603®

0.6
14%

Ucon™
500

1.1
8%

Paratherm
NF®

1.3
40%

TAN increase (condemning limit = 1.0)

% Viscosity change

DOWNLOAD REPORT

Our Customers

No matter the size of your business, we are here to help

What Our Customers Are Saying

Over the years, we’ve received many notes and letters from our great
customers. Here’s a sampling of the things they’ve shared.

K. RosePresident, Ocean Bay Candle Company

I not only gathered information on your products, but also the products of others. You educated me and provided test results to show the differences. We have had the Duratherm 600 in our tanks for almost a year now, and it is working great.Your free testing of the fluid just helps to show that you are committed to your customers and to making sure they have something that lasts and works to their satisfaction

S. PolettoMaintenance Manager, leading bottle and packaging company

I am very happy with the way your Duratherm 600 fluid has performed for us on a day-to-day basis. As you also are aware, I tried your Duraclean and Carb-off products. These performed exceptionally well for us and did exactly what your team said they would do

D. SkaggsMaintenance Manager, Crane Plastics

Duratherm 600 holds up well, even in high temperature processing of all plastics that we use. Duratherm continues to work to improve its product line and delivers excellent service with good dependable products.

J. GerbecMaintenance Manager, Cantex Inc.

The difference from the old Calflo heat transfer fluid and the Duratherm 600 product was amazing. After an entire year of running Duratherm 600, the sludge buildup was minimal compared to Calflo after only 6 months. The performance of the Duratherm product was working so well at our plant. ... I called the other plants and told them of the performance of the Duratherm. They are looking into switching over to Duratherm.

M. FransiscovichMaintenance American Pipe and Plastics

We were thoroughly impressed. The system was spotless, with all of the hard buildup completely removed in 6 hours to a degree that we thought was unattainable without sending units out to be tank cleaned. We then filled the unit with Duratherm and haven't had a single issue with this unit since.

J. ThomasDirector of Metal Injection Molding, Continuous Metal Technology

We have been using it (Duratherm) in our oil jacketed extruder as a heat transfer fluid for over a year now with no problems. We generally run between 180° and 190°C and often run for months between shut-downs. The oil still looks as clear as it did when we first put it into use. I am very pleased with the product and would buy it again if it ever wears out, but that might be a while!

Luke ColbyRocket Propulsion Engineer

Our previous system was freezing up and the low temp capability of the Duratherm XLT-120 is exactly what we needed!

EXPERT TECHNICAL SUPPORT

Global Network

From time-critical order fulfillment, system troubleshooting to free lifetime fluid analysis, Duratherm’s 25+ years of engineering expertise, global footprint and wide breadth of technical support make Duratherm the partner of choice. From your initial consultation, localized safety data sheets to time-critical order fulfillments, Duratherm’s global partnerships provide our client’s local hands-on representation servicing North America, Europe, Asia and Australia.

SAFER & CLEANER

Reduce liability and improve worker health and safety with eco-safe fluids.

Most of the fluids we manufacture are non-toxic and non-hazardous, and many are available in food-grade versions (NSF, FDA and Kosher certified), servicing a wide array of industries.

Most of the fluids we manufacture are non-toxic and non-hazardous, and many are available in food-grade versions (NSF, FDA and Kosher certified), servicing a wide array of industries.

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INNOVATION

Developed by a team of PhD chemists and engineers

Continued research and development, state of the art equipment, OEM engineering and partnerships have led to Duratherm’s many industry firsts, from system cleaners to open bath fluids to the highest flash fluids and the most complete food-grade line in the industry. Coupled with an extensive library of white papers and the industry’s 1st online calculators, Duratherm continues to offer unparalleled products and services to it’s customers across the globe.