High Security Door O∙S∙T®-Barrier
against the entry of air, gas, water and radiation
detectable maximum security for sensitive areas

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SOMMER High Security Door OST®-Barrier


  • Steel door leaf with integrated mounting framework filled with mineral or hard ceramic fillers, or multi-layered door leaf construction with armoured filling
  • SOMMER bolt mechanism with automatic self-locking system
  • Sturdy hinges according to the relevant requirements
  • Mounting frames according to the specific door equipment