Manufacture of other non-metallic mineral products n.e.c.

This class includes:
- manufacture of friction material and unmounted articles thereof with a base of mineral substances or of cellulose
- manufacture of mineral insulating materials:
  • slag wool, rock wool and similar mineral wools; exfoliated vermiculite, expanded clays and similar heat-insulating, sound-insulating or sound-absorbing materials
- manufacture of articles of diverse mineral substances:
  • worked mica and articles of mica, of peat, of graphite (other than electrical articles) etc. 
- manufacture of articles of asphalt or similar material, e.g. asphalt-based adhesives, coal tar pitch etc.
- manufacture of carbon and graphite fibres and products (except electrodes and electrical applications)
- manufacture of artificial corundum

Drying and grinding of clay into clay powder, fit for the production of ceramics

This class excludes:
- manufacture of glass wool and non-woven glass wool products, see 23.14
- manufacture of graphite electrodes, see 27.90
- manufacture of carbon or graphite gaskets, see 28.29