 This high strength material offers excellent chemical resistance and ductile properties suitable for various applications, even those including steam exposure.Ultem is a family of PEI products manufactured by SABIC as a result of acquiring the General Electric Plastics Division in 2007, developed by Joseph G. Wirth in the early 1980s.Ultem resins are used in medical and chemical instrumentation due to their heat resistance, solvent resistance and flame resistance.