1
Chemicals and minerals for use in industry; chemicals and minerals for use in the manufacture of refractory materials; chemical and mineral substances used in the production, preparation and application of refractory materials; silicates, alumina, aluminate, aluminium oxides, alumino-silicates, andalusite, bauxite, mullite, phosphates; industrial chemicals and minerals compositions in brick, prefabricated, granular and powdered form
19
Building materials (non-metallic); natural, artificial and machined stones; marble, sandstone, plaster and gravel; earth for bricks; refractory materials; refractory compositions and materials for industrial use, refractory cement, refractory concrete, refractory mortar, fireproof stone, refractory bricks; calcium aluminate cement; refractory clay for furnaces and furnace coverings, in the form of unprocessed or partly shaped mineral material; refractory materials for applying with a gun; refractory plastering; refractory materials for building purposes; refractory materials for surfacing; refractory compositions for caulking, covering or repairing high temperature apparatus; refractory compositions for caulking, covering or repairing furnaces; refractory compositions for furnaces and blast furnaces; non-metallic rigid pipes for building, sandstone or cement tubes; non-metallic chimneys; refractory ceramic materials for building purposes; earthenware (tiles); lining tiles and non-metallic paving; non-metallic transportable buildings; aggregates; aggregates for use in the manufacture and application of refractory materials; silicon carbide used for refractory purposes
37
Industrial furnace repair and maintenance on-site; installation, repair and maintenance of refractory linings in high temperature chambers; on-site production, preparation and application of refractory linings in industrial furnaces or high temperature chambers; on-site repair of refractory linings in industrial furnaces or high temperature chambers