Building materials for coating walls (other than paint); Building materials of plastic material; Non-metallic building materials; Non-metallic building materials for the covering of walls; Non-metallic building materials for waterproofing purposes; Non-metallic building materials having waterproofing properties; Non-metallic building materials in sheet form; Non-metallic building materials in the form of plastic extrusions; Protective surface (building materials); Surface coatings in the nature of building materials; Wall coatings (building materials) other than paints