TPO is the brand name for thermo-plastic polyolefin or Thermal Polymer Olefin. TPO is comprised of materials combined in a thermal reactor at a molecular level; once combined, the molecules fuse together and cannot be separated, as opposed to other materials that are ground up and melted together. TPO is one of the lightest, most recyclable materials on the market. With a built-in, Ultra Violet protection, it is also one of the most weather-resistant materials on the market. Because it is a polymer, it is a great insulator that also protects buildings from the elements, as it does not conduct sound, electricity, or heat; TPO keeps buildings cooler in the summer. Due to the nature of this material, it stands up to even the most extreme weather conditions without expanding or contracting, which is why the automotive industry uses it in fenders, bumpers, doors, and other body moldings. TPO is also very impact resistant and resilient, making it a prime choice when considering roofing systems that will stand up to hail conditions and harsh storms.