Lexan® Polycarbonate.
Lexan® polycarbonate sheet provides the widest range of properties of all the glazing materials available today. It is known for its clarity, safety, security and energy savings, as well as, for its ease of design. Over the past 12 years it has been used in thousands of structures around the world. In fact, Lexan® polycarbonate sheet, according to General Electric, was cold formed, drilled and installed on site at the Gradski Stadium in Split, Yugoslavia. This is the largest roofing structure of its kind in the world and the entire project was completed on site in 12 weeks.
Lexan® also offers:
Weatherability - It provides excellent clarity, light transmission and UV Stability for added durability.
Energy Savings - It can lower heating and air conditioning costs because it insulates better than glass.
Code Compliance - It provides the highest Class CC-1 rating for approved light transmitting plastics under all three major model building codes.

This example shows the material used in compact disc production.