A thermoplastic is a plastic or resin compound that softens when heated and hardens again when cooled. Examples are styrene polymers and copolymers, acrylics, cellulosics, polyethylenes, vinyls, nylons, and the various fluorocarbons materials. Thermoplastic extrusions come as Rigids, Flexibles and Co-extrusions and are available in a broad spectrum of colors. Typical applications include construction, shop fitting, office furniture, channels, angles, tubes, and roofing.