• The new U-Bahn line in Hamburg, Germany, is a key link in the development of the HafenCity area. The U4 passes under the river Elbe and the Alster basin.

  • Together, they specified Roxtec cable penetration seals to handle the extreme demands for water-tightness, both during construction and in the future.

  • Given the delicate location, Hamburger Hochbahn AG and the tunnel design firm, Obermeyer Planen + Beraten GmbH, decided to go for a proven sealing solution.

  • Roxtec seals are used for efficient sealing of cables and pipes – under flood protection gates, into stations, and into equipment rooms.