Geosynthetic clay liner as sealing element in soil structures

Sealing element in soil structures (geosynthetic clay liner)

Geosynthetic clay liner
Bentofix® NSP 5400 DB
Bentofix® geosynthetic clay liner on an embankment
Railway Sealing element in soil structures geosynthetic clay liner


  • GCL for sealing in areas for environmental protection
  • GCL for sealing of deep drains in groundwater protection areas
GCL in Railway construction as sealing element

Requirements of Deutsche Bahn:

  • Manufacturer related product qualification (HPQ) according to application 3.11*
  • The installation guideline of the manufacturer must be followed


  • Directional independent shear stress transferring needle-punched GCL with more than 2 million fibres/m²
  • High swelling sodium bentonite powder ensures the sealing performance
  • High robustness against installation damages

*Our geosynthetic product specifications are in line with the German manufacturer related product qualification (HPQ, Application number according to DB Standard 918 039 „Technical delivery conditions for Geosynthetics in railway constructions“, Deutsche Bahn AG) All mentioned products types are exemplary according to the above-mentioned specifications. The product types can vary according to local requirements or customer requests.

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