Proudly Canadian. Thermal fluids
for nearly all applications
from -84°C to 337°C (-120°F to 640°F)

Quick Shipping Cleaner and Safer Unmatched Service Extremely Durability
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Quick find your
thermal fluid:

°F°C

Unmatched Service

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  • Quick shipping
  • Lifetime support + free fluid analysis
  • Expert technical assistance
  • System troubleshooting
  • Complete engineering data

What We Sell

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Technical Assistance

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  • Over 25 years experience
  • Group of engineers and chemists
  • OEM technical assistance
  • Numerous OEM partnerships
  • Advanced testing equipment
  • Comprehensive library of white papers

Proudly Canadian since 1973

Maple Leaf
  1. Founded in Southern Ontario servicing the Petro Chemical Industry — Reclamation and Development
  2. Developed processes to reclaim thermal fluids
  3. Co-Developed a line of thermal Fluids with one of Canada’s largest Oil Producers Established US Distribution Network
  4. Launched an expanded line of Thermal Fluids and System Cleaners under the Duratherm Brand
  5. Expanded from North American into Global Markets - establishing a distribution network in Europe, Asia, Australia and South America
  6. Continuing to develop new fluids and expand global presence

Our thermal fluids are among the most
durable and safest on the market

The following graph highlights Duratherm’s exceptional resistance to oxidation,
the leading clause of sludge and fluid degradation.

Developed for use across a wide temperature range from -84°C to 337°C (-120F to 640°F)

Our proprietary additive system provides exceptional protection and fluid longevity, exhibiting improved thermal stability and oxidation resistance relative to competing fluids.

Duratherm’s food-grade fluids are NSF register NSF to meet FDA requirements, and the majority of our fluids are non-toxic and non-hazardous. Duratherm’s fluids are produced under strict ISO standards, ensuring optimal workplace safety and efficiency.

Sometimes it's better to have less!

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 Clients

We can help you no matter how big or small your business is.

What Our Clients Are Saying

Our customers have sent us numerous letters and comments over the years.
Here’s a sampling of some of the kind words we’ve received.

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 ASSISTANCE

Worldwide Network

Duratherm’s  25 years of engineering knowledge, global presence, and extensive technical support make us the preferred partner for time-sensitive order fulfillment, system troubleshooting, and complimentary lifetime fluid analysis.

Duratherm’s global alliances offer our clients localized safety data sheets and timely order fulfillment, ensuring hands-on representation across North America, Europe, Asia, and Australia from the initial consultation.

CLEANER & SAFER

Eco-safe fluids lower liability while enhancing worker health and safety.

Serving a variety of industries, the majority of the fluids we produce are non-toxic and non-hazardous, and many are offered in food-grade forms that are NSF, FDA, and Kosher approved.

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INNOVATION

Developed by a group of engineers and PhD chemists

Duratherm’s numerous industry firsts, including system cleaners, open bath fluids  the highest flash fluids and the most comprehensive food-grade line in the business, are the result of ongoing research and development, cutting-edge machinery, OEM engineering, and collaborations. Together with the first online calculators in the industry and a vast library of white papers, Duratherm continues to provide its clients worldwide with unmatched thermal fluids and services.