IMERYS is a major supplier of high quality minerals to the rubber industry throughout the world.
Our portfolio for rubber includes ultrafine kaolin, calcined kaolin, surface treated calcined kaolin and ball clay.

Calcined kaolin offers superior reinforcement, excellent extrusion and compression set, all important properties to the designer of rubber compounds and articles. Calcined kaolin is chemically inert and our grades have low heavy metal content properties which are beneficial when making pharmaceutical stoppers.

Kaolin offers semi-reinforcing properties in most types of rubber compound, offering the formulator an alternative to more expensive synthetic materials. Kaolin also gives barrier properties which are beneficial when formulating compounds for hoses and gaskets.

Ball clay, offers more reinforcement than Kaolin, as a result of it’s finer particle size. Often referred to as hard clay, it gives excellent compression set and abrasion resistance. A common application for ball clays is in the shoe soling and rubber floor mat industry.

All of our products are supported by a high standard of technical service, product development and research from a team of highly experienced scientists and specialists in the rubber industry.

Related Topics
Kaolin in Technical Rubber

Product Related Literature

Kaolin in rubber
Polestar™ 200R
Polarite™ 103A
Polarite™ 503S
Polarite™ 102A
Polestar™ 200R (EPDM Rubber)


To find out how our products can help your products and processes please contact us

Dr. Flavio Catozzo

Dr. Flavio Catozzo

Product Spotlight


Supreme™ premium kaolin from IMERYS gives multiple benefits when used in decorative matt wall paints, functioning both as an opacifying extender and also as a rheology modifier.
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