Shop for PPSU sheet. PPSU (Radel® R-5500) is a high temperature thermoplastic material with outstanding impact resistance and the ability to withstand repeated cycles in a steam autoclave. Often used instead of polysulfone or Ultem® for medical applications when superior toughness or extended service life is desired. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote.