19 Ceramic building materials, bricks and refractory products, namely, ceramic bricks for use in refractory furnaces, ceramic drain pipes, ceramic enamel tiles, ceramic roofing tiles, ceramic shapes for use in refractory furnaces, ceramic tiles for flooring, lining, facing, coverings, wall and ceiling, and glazed ceramic tiles, bricks and refractory construction materials not of metal; building materials made of linoleum for fixing to existing walls or floors, namely, vinyl flooring and tiles for wall or floors; plastic building materials, namely, multilayer panels of plastic for use in building pipe supports in the nature of rigid non-metallic interlocking plates or strips, with or without steel reinforcements, to be spirally wound and grouted into the interior of an existing pipe or pipeline, to line and strengthen such pipe or pipeline, plastic drain pipes, plastic tiles, plastic shapes for use in refractory furnaces, plastic tiles for flooring, lining, facing, coverings, wall and ceiling, and glazed plastic tiles; synthetic building materials, namely, composite panels composed primarily of nonmetal materials; asphalt, and asphalt building or construction materials, namely, asphalt-based mastics for foundations of buildings; rubber building or construction materials, namely, tiles for use on indoor and outdoor floors; plaster for building purposes; non-agricultural lime building or construction materials; building or construction materials of plaster, namely, plaster for use in building, plaster boards; erosion control sheeting made of rubber for construction use; erosion control sheeting made of plastics for construction use; buildings not of metal, namely, non-metallic transportable buildings; cement and its products¿ namely, cement mortar tiles; building timber; building stone; building glass; seals for building or construction¿ namely bitumen based roofing or wall sealants; synthetic resin pipes for building or construction