Rubber / Rubber Compounding / Kaolin


Mineral: Kaolin 


In APAC, Sibelco’s Kaolin products are used in rubber formulations.

Kaolin is a layered silicate clay mineral, part of the group of minerals with the chemical composition Al2Si2O5(OH)4


Kaolin can be characterised by:

  • Relatively low Mohs hardness of 2
  • Low electrical conductivity
  • Easy to wet
  • High inertness in various media
  • Its layered structure


Basic properties

Property Value Unit
Hardness (Mohs) 1.0 – 2.0 [-]
Refractive index 1.56 [-]
Density 2.16 -2.68 [kg/ dm3]



Product Grade D50


Snobrite 60 1.2
68 0.9
75 0.5


Production Location: McIntyre, Illinios

Application: Kaolin products are used in rubber compounds to give these more body and affect the rheology.

Functionality: Performance

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