This website uses 'cookies' to give you the best, most relevant experience. Using this website means this is Ok with you. To find out more click 'how we use cookies'.x

Select your language


Specialist Materials for Industry and Science

Midel Ester-Based Dielectric Fluids

MIDEL is the world’s leading brand of ester-based dielectric fluids, used by utilities and transformer manufacturers worldwide because of its excellent track record and ability to minimise risk.

Our synthetic ester MIDEL 7131 and our natural esters MIDEL eN 1204 (rapeseed/canola) and MIDEL eN 1215 (soya) all provide the crucial combination of fire safety and environmental protection properties absent in mineral oil. They can also significantly extend the life of your transformers. Synthetic and natural esters (vegetable oils) are successfully used in new and retrofitted liquid-filled electrical equipment installations across the globe. To see how mineral oil compares to esters please visit our Fluids Comparison.

The MIDEL team is recognised in the industry as experts in the production of ester-based dielectric fluids; our commitment to delivering excellent technical support is also recognised by our customers. For assistance in choosing the right fluid for your project contact us today. To learn more visit About Esters

MIDEL natural ester transformer fluids are now manufactured and distributed in the United States - click here to learn more.

Our products

MIDEL 7131

A synthetic ester designed for breathing and sealed transformers situated indoors or outside, including installations in cold climates.
Read moreRead more
.

MIDEL eN

Our natural ester transformer fluids are developed for sealed transformers indoors or outside – ideal for installations in temperate climates. MIDEL eN fluids provide an effective solution for distribution transformers because they offer a cost effective, fire safe alternative to mineral oil.
Read moreRead more
.


  • Apiezon
  • Metrosil
  • Midel
  • Wolfmet

Products of M&I Materials Ltd.