Lining reservoirs with synthetic geomembranes separates the liquid mass from the soil. The purpose of the lining is to keep soil clean and prevent groundwater contamination. In cases where clean water is stored, sealing of the reservoir by means of HDPE membranes prevents loss of valuable water and protects the stability of the embankments and adjoining structures.

Use of HDPE membranes in reservoirs is of proven cost/benefit advantage, with such reservoir lining implemented in tens of thousands of projects throughout the world.

Lining reservoirs integrates several geotechnical products in addition to the geomembranes, consisting of geotextiles for protection and puncture prevention, various types of drainage mats and geonets and perforated drainage piping.