Covestro Makrolon Polycarbonate Sheeting are considered unbreakable

Makrolon Polycarbonate materials have a balance of helpful features which include temp resistance, impact resistance and optical properties position polycarbonates between commodity plastic materials and engineering materials.
Polycarbonate is a very rugged material. Although it features considerable impact-resistance, it possesses minimal scratch-resistance and so a hard coating is often applied to polycarbonate eyewear lenses as well as polycarbonate exterior auto components. The properties associated with polycarbonate are generally like those of Acrylic PMMA materials, except polycarbonate is always stronger, it is usable in a wider temperature range and is a bit more expensive. This plastic polymer is highly transparent to visible light and has better light transmission characteristics than most grades of glass.
Polycarbonate has a glass transition temperature of around 150 °C (302 °F), in order that it softens gradually above this point and flows above about 300°C (572 °F). Tools must be held at warm to high temperatures, generally above 80 °C (176 °F) for making strain- and stress-free products.
Unlike most other thermoplastics, polycarbonate can undergo large shape changes without cracking. For this reason, it may be processed and formed   cold using standard sheet metal techniques, for instance forming bends on a brake. Even for sharp angle bends having a tight radius, no heating is usually necessary. This makes it useful for prototyping applications where transparent or electrically non-conductive parts are needed, which should not be made from sheet metal. Understand that PMMA/Plexiglas, which is similar in appearance to polycarbonate, but it's brittle and cannot be bent with out a heating process.
Polycarbonate is commonly found in eye protection, in addition to other projectile-resistant viewing and lighting applications that would normally require the use of glass, but require higher impact-resistance. Many different types of lenses are created from polycarbonate, including automotive headlamp lenses, lighting lenses, sunglass/eyeglass lenses, swimming and SCUBA goggles, and safety visors for use in sporting helmets/masks and police riot gear. Windscreens in small motorized vehicles are commonly constructed from polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.

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