EPDM is a thermo-set membrane, compounded from rubber-polymer and often referred to as “rubber roofing”. This lightweight synthetic elastomeric material has been used since the early 1970s. Some of the features that contribute to the popularity of EPDM single ply roofing include long-term weather ability, including excellent resistance to temperature extremes, sunlight, ozone and moisture while providing the ease of quick and clean installation. Another feature is adaptability. Varied application techniques such as ballasted, fully adhered and mechanically fastened allow EPDM roofing systems to be applied to virtually any roof surface—flat, spherical, curved or slanted.