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Nyad range

Nyad® range Wollastonite for fiber cement board and concrete

Imerys Nyad® wollastonite grades are ideal for use in wet room and fire-resistant fiber board. Combined with metakaolin, they improve cracking and ductility in concrete.

Fiber cement board

Imerys Nyad® wollastonite grades are suitable for use in fiber cement board  where they are required to provide high temperature resistance as well as dimensional stability in wet room applications, or where fire-resistant formulations are required.

For wet room applications, Nyad® can be formulated to create a synergetic effect with our Suzorite® 20 S and Suzorite® 30 S low bulk density phlogopite micas, which improve thermal shrinkage and control hydric movement.

We recommend our Nyad® G and Nyad® MG wollastonite grades for this application.

Nyad® G grade is a high aspect ratio wollastonite with a needle-like structure


Nyad® wollastonite has a synergistic effect with metakaolin when used in concrete. Used in combination with metakaolin, Nyad® 

  • Improves early age strength
  • Reduces micro-cracking
  • Increases flexural and compressive strength
  • Provides superior ductility and fracture toughness
  • Provides greater shrinkage resistance
  • Is an excellent extension to macro fibers and textiles
  • Provides ease of mixing
  • Is a sustainable replacement/reinforcement on a micro scale

We recommend our Nyad® G product for concrete applications.

We offer a full range of custom 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 happy to help

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