19 Non-metallic building materials, namely, non-metal building panels, non-metal building tiles, non-metal building slabs of glass wool, non-metal ceiling panels, non-metal ceiling tiles, non-metal wall panels and non-metal slabs of glass wool, non-metal wall panels, non-metal slabs of glass wool and non-metal tiles, wall claddings not of metal, linings and coatings for walls and ceilings in buildings not of metal; Suspension systems for ceilings not of metal comprising panels; Facing sheets of plywood; partitions not of metal for buildings; Non-metallic latticework, runners not of metal for sliding doors, non-metal picture hangers, non-metal profiles, non-metal trims for suspended ceilings and walls, non-metal clips for suspended ceilings and walls; Parts and fittings for all aforesaid goods, not included in other classes; Building materials for coating walls and ceilings, namely, water based acrylic sealer coatings for use on ceilings and wall panels, excluding paints; Building materials in the nature of non-metallic coatings, excluding paints, namely, water based acrylic sealer coating for use on ceilings and wall panels; Glass wool ceiling panels and glass wool wall panels for use in absorbing sound