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Product description

The PENTAFLEX® OBS rated-crack elements belong to the PENTAFLEX® joint sealing system for producing watertight concrete structures (white tank) and are used to supplement rated-cracks in the walls of cast-in-situ concrete. They comprise of a joint sheet with the proven PENTAFLEX® special coating, as well as flanks made from galvanized steel sheet, which reduces the cross section of the concrete. Simultaneously, the crack that occurs is secured against pressurized and non-pressurized water by the integrated sealing element.

  • Impervious up to 7.0 bar (according to abP 2.0 bar)
  • Quick and easy installation of the elements
  • Reliable generation of the shrinkage crack by complete detachment of the cross section of the concrete
  • Resistant against all organic effluents
  • Simple and secure joining with the PENTAFLEX KB® joint sheets

Approval/test certificate:

General building test certificate P-5120/231/09 MPA-BS.


Galvanized sheet steel with special coating and removable protection strips. 

Delivery lengths:

Length 2.50 m, standard installation dimensions 140 – 180 mm.

Other dimensions on request.

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Länge 2,50 m, Standard-Einbaumaß 140 – 180 mm.

Andere Abmessungen auf Anfrage.

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