This specification covers a synthetic rubber in the form of sheet, strip, tubing, extrusions, and molded shapes. Primarily for packing and sealing joints which come in contact with aircraft fuels, hot petroleum-base lubricating oils, and ethylene glycol from -29 degrees to +104 degrees C (-20 degrees to 220 degrees F). This material has fair resistance to all fluids listed. Where better resistance to a particular fluid is required, use the AMS for material compounded specifically for good resistance to that fluid.