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  • EPDM rubber (ethylene propylene diene Monomer (M-class) rubber),[1][2] a type of synthetic rubber, is an elastomer which is  characterized by a wide range of applications. The E refers to Ethylene, P to Propylene, D to diene and M refers to its  classification in ASTM standard D-1418. The M class includes rubbers having a saturated chain of the polymethylene type.
  • Ethylene Propylene Diene Monomer (or Terpolymer which is simply a product consisting of three distinct monomers).
  • EPDM is classified as a Thermoset material which means it is either fully-cured prior to being installed or that it cures during natural weathering after installation.
  • EPDM roofs are single-ply membranes meaning there is only one ply of roofing material, not multiple plies laminated together.
  • EPDM is a rubber material whose principal components consist of the compounds ethylene and propylene. A flexible rubber matrix forms when a small amount of diene is added to the mix.
  • EPDM is available reinforced or unreinforced with both commonly used; it's also available in either a cured (vulcanized) or uncured (non-vulcanized) state. Vulcanized EPDM is the most common with non-vulcanized often used for flashing purposes.
  • EPDM rubber is used in vibrators and seals; glass-run channel; radiator, garden and appliance hose; tubing; washers; belts; electrical insulation, and speaker cone surrounds.
  • EPDM is also used as a medium for water resistance in electrical cable-jointing, roofing membranes, geomembranes, rubber mechanical goods, plastic impact modification, thermoplastic, vulcanizates, and many other applications.
  • EPDM exhibits satisfactory compatibility with fireproof hydraulic fluids, ketones, hot and cold water, and alkalis, and
    unsatisfactory compatibility with most oils, gasoline, kerosene, aromatic and aliphatic hydrocarbons, halogenated solvents, and concentrated acids.
  • The main properties of EPDM are its outstanding heat, ozone and weather resistance. The resistance to polar substances and steam are also good. It has excellent electrical insulating properties.
  • EPDM is used as a covering to waterproof roofs. It has the benefit that it does not pollute the runoff rainwater, which is of
    vital importance if the house owner wishes to use this water for personal sanitation/hygiene. Several houses equipped with
    rainwater harvesting thus make use of this type of roofing.
  • Weather ability is main benefit to EPDM's success, and a recent study showed that new and aged nonreinforced EPDM roof assemblies offered a high degree of hail resistance over a variety of roofing substrates, including polyiso, wood fiber,
    plywood and OSB board.
  • Two types of EP rubber are available in today's market. They are ethylene propylene (EP) which uses a peroxide cure system and ethylene propylene diene methylene terpolymer (EPDM) which uses a sulfur cure system. These polymers are recognized for their resistance to weathering and high temperatures. The EP rubbers have slightly better heat resistance than the EPDM rubbers; however, the EPDM rubbers are easier to process and manufacture.
  • EPDM has achieved a reputation in the industry as a long-lasting material, and advancements in materials, techniques, and components have given manufacturers the confidence to offer the industry's longest warranties of thirty years.
  • According to the EPDM Roofing Association, EPDM market share in Europe is around 12 percent and growing, compared to 35 percent in the North America where 20 billion-plus square feet has been installed on low-slope roofs. There has also been continued growth of EPDM in the Middle East and China.
  • EPDM has been in use on roofs in the USA since the 1960's and is one of the most common types of low-slope roofing materials. This is because it is relatively inexpensive, simple to install, and fairly clean to work with when compared to conventional built-up roofs.
  • In 2009, China's automotive industry consumed approximately 80 thousand tons of EPDM rubber, accounting for 42.11% of China's total. It is the biggest EPDM rubber consumer in China. In coming years, with the constant development of China's automobile industry, urban infrastructure and rail transport, the demand for EPDM rubber will continue to increase in China. It is expected that in 2014, China's total demand for EPDM rubber will reach 240 000 tons.

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