EPDM (short for Ethylene Propylene Diene Terpolymer) is a synthetic rubber roofing material that is used primarily on low-slope roofs of businesses, and less commonly on residential buildings. EPDM is available in black or white and has the choice between two thicknesses of 45 or 60 mils. This type of material can be adhered to a roof, attached mechanically, or sealed over the overlapping seams with a liquid adhesive or a high-strength tape. For durability, EPDM has an advantage over other roofing materials. Even with minimal attention, an EPDM roof can last up to 50 years.