NBR is a synthetic rubber, and its oil resistance is second only to polysulfide rubber and fluorine rubber. The heat resistance of NBR is better than that of natural rubber, styrene butadiene rubber and chloroprene rubber, and can be used for a long time at 120 °C in the air. But the cold resistance of NBR is poor, and the higher the content of acrylonitrile is, the poorer the cold resistance is. The air tightness is better, second only to butyl rubber. In addition, NBR also has excellent ozone resistance and electrical insulation performance, as well as good water resistance and chemical corrosion resistance.