epdm

Ethylene Propylene Diene Monomer (EPDM) is an extremely durable synthetic rubber roofing membrane (ethylene propylene diene terpolymer) widely used in low-slope buildings in the United States and worldwide. Its two primary ingredients, ethylene and propylene, are derived from oil and natural gas. EPDM is available in both black and white, and is sold a broad variety of widths, ranging from 7.5 feet to fifty feet, and in two thicknesses, 45 and 60 mils. EPDM can be installed either fully adhered, mechanically attached or ballasted, with the seams of the roofing system sealed with liquid adhesives or specially formulated tape.”

“Ethylene Propylene Diene Monomer (EPDM) is a type of synthetic rubber and elastomer which is characterized by a wide range of applications. Dienes currently used in EPDM manufacture are dicyclopentadiene (DCPD), ethylidene norbornene (ENB), and vinyl norbornene (VNB).”

Sources:
http://www.epdmroofs.org/what-is-epdm
http://www.entecpolymers.com/products/resin-types/ethylene-propylene-diene-terpolymer-epdm/

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