To main content


In environmental and civil applications in many cases a need to block a waterflow is faced, in order to avoid groundwater spreading of pollutants or be able to create a so called polder construction.

Cofra has various barrier solutions available. Some of these make use of HDPE membranes, resistant to a wide range of chemicals. Other are based on cement bentonite walls installed with a trencher. Sometimes we combine these techniques. Our barriers can be installed horizontal, on a slope or even vertical over 30 meters of depth. Cofra solutions focus on separation, not on structural strength.

Find out more by using the links in the overview below. 



Csm PICT1046 F61417c5ec

Our solutions

Cofra has the following barrier solutions within it's portfolio

A selection of our barrier projects

Selected filters

Geolock installation to prevent contamination spread around a factory in Kokkola, Finland

We installed 12,000m2 of Geolock, a vertical impermeable 2mm HDPE seal, up to a depth of 9m to assure watertightness and prevent the spread of contamination around the waste area of a factory in Kokkola, Finland, in 2006-2007.


Geolock installation to prevent seapage of water in Escravos Nigeria

We installed 13.000m2 of Geolock, a vertical impermeable 2mm HDPE seal, up to adepth of 5.5m to assure watertightness around a gass plant in Escravos Nigeria in 2004