Welcome to Imerys Performance Minerals


Wollastocoat® For carbon black replacement in color-sensitive fluoroelastomers

Wollastocoat® wollastonite is a fine particle size, low aspect ratio calcium silicate which has been chemically modified.

Wollastocoat® is particularly recommended for replacing carbon black in color-sensitive fluoroelastomer O-ring and gasket applications.

Replacing carbon back N990 by coated wollastonite Wollastocoat® M1250 (at the same phr) in a fluoroelastomer (FKM) with a bisphenol cure system:

  • Improves compression set
  • Shortens curing times
  • Maintains torque

Wollastocoat M1250

We offer a full range of bespoke formulation and technical and process support services to help you match the right mineral grade to your application requirement.

Please contact us, we will be only too happy to help

Contact us Contact