High Performance
Heat Transfer Fluids & System Cleaners
From -148°F (-100°C) to 752°F (400°C)



Our heat transfer fluids last longer than most industry fluids because they contain a proprietary advanced additive technology. 99% of our fluids are also safe, non-toxic and non-hazardous.


In standard oxidation resistance and thermal stability tests, Relatherm outperforms and outlasts the rest. Learn more about why our heat transfer fluids are better here.


Our advanced Thermofluid Research and Development program puts us at the leading edge in our industry. We know heat transfer fluids and system cleaners inside out. We combine this knowledge with decades of field experience in diverse industries.


Relatherm offers unrivalled and unmatched technical support, available 24 Hours a day, 7 days of any week. You can always rely on us for expert advice on all matters related to thermal fluids. Contact us today.


We are obsessed with customer satisfaction and delight. So, we offer dedicated Customer Care Managers, super easy ordering, same-day shipping, order tracking and follow-up support.


Our Thermofluid Care Program offers free fluid testing and analysis. This will help you to run longer, cleaner, and more efficiently.


We have numerous success stories and testimonials from happy customers. Check out our Badge of Honor and customer accolades here.

Featured Products

MAX USE TEMP 340ºC / 644°F | MIN USE TEMP 15°C/59°F

Engineered thermal fluid designed for high temperature applications where a high flash point is beneficial for process safety management. It can serve as a non-toxic and non-hazardous alternative to popular aromatic heat transfer fluids PRODUCT SUMMARY Highest Flash Point in [Read more…]

MAX USE TEMP 338°C/640°F | MIN USE TEMP 15°C/59°F

A premium engineered thermal fluid rated for use in food processing, food packaging and pharmaceutical applications where a high flash point has technical and commercial benefits. It is rated for use up to 344°C/644°F. Infused with the Relatherm Dual Stage [Read more…]

MAX USE TEMP 260°C/500°F | MIN USE TEMP -7°C/19°F

Engineered thermal fluid formulated as a better alternative to the UCON 500® PolyAlkylene Glycol Fluid. Unlike its predecessor which has a low oxidative stability and a short service life, Relatherm PAG is a premium PolyAlkylene Glycol heat transfer fluid infused [Read more…]

MAX USE TEMP 316°C/600°F | MIN USE TEMP -29°C/-32°F

Extended life thermal fluid used extensively for process cooling in chillers and other cryogenic equipment. It cools processes down to -29ºC/-30˚F and maintains excellent pumpability in the sub-zero temperature range. By virtue of its wide temperature bandwidth, it can also [Read more…]

Some of Our Customers

These Fine Customers Trust Relatherm Heat Transfer Fluids

Contact Us

Relatherm Heat Transfer Fluids

(A Business of Allstar Fluid Sciences LLC)

Toll Free: 1-800-387-0406
International: +1-904-687-2228


Mailing Address:

P.O.Box 57874,
Jacksonville, FL, 32241,

6501 Arlington Expy,
Jacksonville, FL, 32211,