At Imerys Refractory Minerals we produce mullite-based chamottes for sanitaryware and ceramic floor tiles production. Clays are also used for their ideal deflocculation in sanitaryware, tiles and Kerphalite™, as zircon substitute in glazes and opacifiers.
Mullite offers shrinkage control and controlled thermal expansion. In addition it enhances the mechanical strength and whiteness of a ceramic body.

Our products are an ideal fit with the Imerys Ceramics portfolio.



For sanitary ware ceramic applications, adding of chamotte to the mixture can prevent distortion during firing, allowing the production of bigger and more complex pieces.
The tile industry also uses chamottes for extruded tiles in particular.

Our brand portfolio is comprised of the well-known Mulcoa®, Clayrac™ and CHK™ lines.


Our range of Clayrac™ sanitaryware chamotte  is comprised of:
A very high-quality chamotte – Clayrac™ epurée
An affordably-priced chamotte – Clayrac™ SMD, offering suitable quality for many applications and Clayrac™ SHD, used for dilatometric correction.
Clayrac sanitaryware chamotte range

Our Mulcoa® product is a high alumina chamottes with alumina content going up to 70%
Mulcoa range
Our CHK™C1 is famous for its high expansion
Individual technical datasheet is available upon request.



Clay is essential for ceramic production because of its high plasticity and strength.


Discover our Clayrac™ range of clays covering all types of ceramics applications.

Clayrac dried and milled clay range
Clayrac shredded sanitaryware clays range



Molochite is widely used as filler for the production of glazes and engobes. Freedom from contamination and accurate control of physical and chemical properties make Molochite the ideal choice for high quality end products.


Molochite Thermal Performance

Individual datasheets are available upon request.



Kerphalite KF is a natural source of alumina and mullite which can be profitably used when better control of your ceramic support’s physical and chemical properties of is required.

Due to its high-purity and very fine particle size distribution, micronized Kerphalite KF is an efficient and economical alternative to zircon silicate as an opacifier for glazes and engobes.


For more details and individual datasheets, please contact us.