19 Building materials (not of metal); dry mortar, especially wall mortar, screed, coating and precious coating, adhesive mortar, coating materials for walls, plaster, mortar or screed (building material), under-plaster, reinforcing mortar and/or over-plaster also as a component of a heat and insulation system with mortar, dry concrete; pasty building materials, plaster jointing mortar; expanded clay granular material as well as structural elements made therefrom (building material); expanded vulcanic rock (building material); gypsum, lime and clay as building materials or building components; asphalt, pitch, bitumen; chemical chalk for building purposes; cement, lime and clay for building purposes, gravel, tar, roofing felts; plastic resin bound friction plaster and composite stone plaster; stucco; cell binding plaster additives, hydraulic setting water repellent, finished mortars for internal plasterwork, white plastic reinforced joint fillers for jointing sludge technology (building material), plug cement, thin bed mortar, screeding mortar, screed additives, ready-made mortar, fine mortar, casting mortar, jointing mortar, fine fillers, extrusion agents, tiles, tile elements, repair mortar, laying mortar, medium bed mortar, fast setting cement, floor equalizing mass, floor coatings, plasters, sanitary plasters, levelling agents (building materials), evening out compounds (building material), grouting, adhesive and coating compounds (building material), woven strips for building purposes if contained in this class