Welcome to Imerys Performance Minerals


Suprex Air-floated hard kaolin for superior mechanical properties

  • Superior modulus
  • Excellent green strength
  • Improved tear and abrasion resistance
  • Enhanced processability

Suprex is air-floated hard kaolin designed to improve the mechanical properties of EDPM, SBR and silicone rubber in a broad array of end applications.

Used in rubber compounds, Suprex improves:

  • Modulus
  • Tensile strength
  • Tear resistance
  • Abrasion resistance
  • Green strength
  • Processability
  • Cured stiffness


Suprex is suitable for the following compounds:

  • SBR: improves tensile strength and wear and tear properties
  • Natural Rubber: can be used at very high loading in natural tree rubber applications without affecting processability
  • Polychloroprene: provides outstanding tear resistance at high loading
  • Butyl Rubber: greatly improves tear resistance


Suprex is recommended for:

  • Automotive hoses
  • Cable sheathing
  • Shoe soles
  • Hydraulic and industrial hoses


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

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