The Relatherm Difference

Relatherm Heat Transfer Fluids outperform and outlast most heat transfer fluids in the market, including those sold by major brands/companies. This superlative performance is built upon a unique manufacturing and service philosophy that we call ‘The Relatherm Difference’. Our industry leading Extended Life Additive Technology provides maximum fluid longevity and superior oxidation resistance. We also continuously advance the frontiers of Research & Development in the Heat Transfer Fluids space, leading to some of the most advanced Thermofluid technologies in the market. We are confident enough in the robustness of our heat transfer fluids, so we benchmark our products against common competitor products from time to time. Moreover, our customer service and technical support are second to none in our industry. If you love to stay on top of things, you will certainly love our free Fluid Testing & Analysis program.  See more details on how we are uniquely different from other vendors below.


  • Relatherm Heat Transfer Fluids feature an advanced Extended Life Additive Technology
  • Our premium additive technology protects your heat transfer system and keeps your equipment running longer, cleaner, and safer.

Our advanced Thermofluid Technology is a major game changer and industry differentiator that sets Relatherm apart favorably from other thermal fluids in the market.


  • Our products are the result of over 27 years of advanced ThermoFluid Research & Development.
  • Powered by a team of experienced Chemical Engineers, Mechanical Engineers and Chemists.
  • Based on a combined field experience spanning over 45 years.
  • We focus on advanced fluid formulation and testing with an array of field equipment and custom test rigs.


  • Same day shipping on 99% of regular orders.
  • Our knowledgeable Customer Care Managers are always ready to help.
  • We respond to all email inquiries within 30 minutes, guaranteed!
  • Easy order placement, order tracking and visibility.
  • Convenient payment methods and options.
  • Fast credit approval and generous credit terms for qualified customers.



Repeatable and standard laboratory tests confirm the superior performance of our heat transfer fluids when compared to many popular industry fluids. These comparative tests show that our thermal fluids:
  • Offer the maximum protection and the most resistance to oxidation
  • Last much longer in service
  • Run cleaner – resists sludge formation and buildup
  • Have lower vapor pressure
Read more about the results of our comparative tests here.


Free fluid testing, analysis and result interpretation are an important part our industry leading ThermoFluid Care Program. Our laboratory is open all year round  offering independent thermal fluid testing to end users. Learn more about our free heat transfer fluid testing and analysis here.


We take pride in helping our customers’ equipment run longer, cleaner, more efficiently, safely, and trouble-free.  While our additive technology, technical expertise and expansive product offering, speak volumes, we know you would like to see what some of our customers have to say. See testimonials and success stories from happy customers here.