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.

  • Midel
    Sep 7th, 2016
    M&I Materials celebrated the success of its new US operations at its Americas office in Metro Atlanta, GA. M&I Materials is a renowned manufac...
  • MIDEL-Risk-Mitigation-White-Paper
    Aug 23rd, 2016
    With ageing fleets across the globe and growing energy demands, utility providers are under increasing pressure to implement new technologies that can...
  • MIDEL highlighting successes at CIGRE session in Paris
    Jul 12th, 2016
    July 12, 2016 – MIDEL’s industry experts will be exhibiting at the prestigious CIGRE power event in Paris from 21-26 August, 2016. The CIG...