NBR and EPDM are two types of rubber materials. NBR stands for Nitrile Butadiene Rubber while EPDM stands for Ethylene Propylene Diene Monomer Rubber. The main difference between NBR and EPDM is that NBR is a non-aromatic polymer compound while EPDM is an aromatic polymer. Also, NBR is made from the monomers acrylonitrile and butadiene, while EPDM is made from ethylene, propylene, and a diene comonomer.
Because of this, it is commonly used for washers and O-rings that seal fuel systems in cars, boats, airplanes, and stationary engines.
It can be formulated for temperatures from -55C to 135C. The main disadvantage of nitrile rubber is that it can be affected by exposure to the sun, general weather conditions or ozone from electrical equipment unless it is specifically manufactured for these purposes.
