Buna is our most popular gasket material also; called nitril, or NBR. This oil resistant rubber compound has excellent compression set, tear and abrasion resistance. These gaskets have theability to be detected by Metal and X-Ray detection equipment. This will allow production line workers to quickly identify and remove contaminated product from the production line. Ozone degrades Buna-N, do not store gasket near electric motors and other ozone sources. Temperature range: -40° to 224° F.