For general-purpose applications requiring oil resistance Nitrile (Butadiene Acrylonitrile, BUNA N, NBR) is the polymer of choice. It has outstanding resistance to oil, gasoline, petroleum based hydraulic fluids and hydrocarbon solvents. In addition, it can offer good resistance to alkalis and acids. Nitrile can be formulated to have a wide range of service temperatures.
Nitrile (Butadiene Acrylonitrile, BUNA N, NBR) is not recommended for applications involving exposure to ozone, weathering, heat and sunlight. It offers poor resistance to polar solvents such as esters, ketones, chlorinated solvents, or nitro carbons.