The M&I Materials company in Manchester, UK, makes Metrosil materials. The Micanite & Insulators Co. Ltd (‘M&I’) was established in 1901 and eventually became The Micanite & Insulators Co. Ltd (‘M&I’).

In 1993, M&I became an independently owned corporation by acquiring the Metrosil®, MIDEL®, Apiezon®, and Wolfmet® brands.

M&I Materials remains focused on commercializing specialist materials for demanding applications and is proud of the wide range of company and product awards, approvals, and certifications it has worked hard to achieve and maintain.

Since 1998 Micronova has been distributing Metrosil nonlinear resistors for surge protection. Manufactured by M&I Materials in the UK, Metrosil is trusted by some of the largest substations, protection schemes, power stations, and research organizations in the world.