Cookies on the SKF website

We use cookies to ensure that we give you the best experience on our websites and web applications. By continuing without changing your browser settings, we assume you give your consent to receive cookies. However, you can change your browser cookie setting at any time.


Nitrile (NBR) may be the most common elastomeric seal material for use in applications requiring oil resistance, durability and set resistance.  Nitrile materials are compatible with most hydraulic media, including petroleum oils, water glycol, water/oil emulsions and many synthetics.  A-8508 is an extended temperature grade material suitable for use from –54°C to +115°C (–65°F to +240°F).  It has the lowest possible NBR temperature range and is well suited for use in Z seal lips, T seals and other products that must perform in cold weather. A-8508 also has a friction reducing agent to lower the coefficient of friction.  NBR is not recommended for use where exposed to sunlight or ozone.
  1. 1)Values are typical averages only. Test information is based on specific conditions and limited sample size, and is only for general guidance. It does not supercede published data for the product. Customer must decide suitability for his purpose. Information applies at room temperature unless specified otherwise.
SKF logo