These plastics are used for signage, shopfitting and fabricated items such as tanks, barrels, boxes, lids, machine guards, covers and much more. Examples of these plastics are acrylic, polycarbonate (lexan), PVC, polypropylene, HDPE, ABS and styrene. Many of these items can be welded and glued as well. Above: Machine guards made from clear unbreakable Polycarbonate.