Normal Working Temp. - 40 C to 125 C. This polymer is well known as Nitrile. They are difference based on ACN content. Nitrilehas excellent resistant to most of petroleum products, fuels and oils and broad balance of high and low temperature.It has excellent resistant to compression set , good Resilience, Tear and Abrasion Resistant. As ACN increases , Resistant to Oils, Gasoline, Grease, Mineral oils, Vegetable oils, improved. Also physical properties increases Tensile, Hardness, Gas permeability, Heat resistant, Abrasion resistant improves.