Poly-carbonate is naturally transparent, with the ability to transmit light nearly that of glass. It has high strength, toughness, heat resistance, and excellent dimensional and colour stability. Poly-carbonate is a transparent polymer which has the appearance of perspex. Clear Burglar Bars are made of high tensile, thermoplastic polymer which has a tensile breaking strength of 3000 kg. This poly-carbonate thermoplastic is the strongest in the world. Poly-carbonate is used in the manufacture of riot-shields!