Welcome to Imerys Performance Minerals


Pharmaceutical Imerys minerals are valuable ingredients for medical supplies

Imerys minerals are prized ingredients for the production of medical stoppers, latex gloves and dental alginates.

Medical stoppers

Imerys calcined kaolin clay provides the resealability, barrier properties and mechanical performance critical to protecting medicines from contamination and oxidation. 


  • Improves gas permeation and water absorption 
  • Improves sealing properties and good resealing after puncture
  • Improves chemical resistance
  • Provides good steam and ethylene oxide sterilization resistance and UV radiation resistance
  • Are ideal reinforcing agents, improving  mechanical properties of stoppers
  • Effective processing aids, lowering compound viscosity and improving compound flow
  • Provides good thermal resistance,  color retention and extends service life
  • Are chemically inert and do not react with medical substances, having no effect on the level of reducing substances, pH and UV light absorption

We recommend:

Glomax LL grade for multi-dose rubber stoppers where resealability is required. 

Dental alginates molding

Alginates used for dental molding are visco-elastic materials with rubber-like compliance. Alginates contain high levels of diatomaceous earth (DE) filler. 

Imerys DE for alginates provide low compression set and low swelling, enabling dentists to produce an accurate mold of the patient’s mouth. 


We recommend:

Celite DE range for dental alginates molding.

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 only too happy to help

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Health, Pharma & Biotechnology