Trusted by leading companies all over the world

Companies we work with


We are the world leader in ester fluids for transformers. And we have the technical experience and credentials to prove it.

In the 1970s, we recognized the need for an alternative to mineral oil. One that could combat flammability and low moisture tolerance, while delivering environmental safety. MIDEL was the result.

Proven performance in thousands of transformers worldwide. But it’s our technical excellence and years of experience that really sets us apart.

Together with our manufacturing partner, Valtris Specialty Chemicals, we guarantee unparalleled supply and service anywhere in the US.

Welcome to a new world of choice.

MIDEL Safety Inside


What can MIDEL ester transformer fluids do for you?

  • Safeguard your transformer – with a high fire point (>300°C), safety is maximized.

  • Protect the planet – fully biodegradeable, environmentally safe.

  • Take it to the max - up to 20% overload allows your transformer to run harder or for longer.

  • Superior moisture tolerance - to extend the life of your transformer.

  • Amanda Snip
    Apr 18th, 2018
    M&I Materials, a global leader in commercialising specialist materials for demanding applications in industry and science, has appointed Amanda Qu...
  • Midel
    Apr 9th, 2018
    Listing of MIDEL articles and content in our industry media: Industrial Fire Journal: Cool Transformers (Pg 56) 4 April 2018 Energy Voice: Why extendi...
  • Apr 3rd, 2018
    MIDEL ester transformer fluids continue to deliver tangible risk and performance solutions to utilities, transformer OEMs and industrial end users thr...