Geomembrane Liners – What Are They And What Are They Useful

Geomembrane LinersA geomembrane is very low permeability synthetic membrane barrier or liner and is used in conjunction with other geotechnical engineering materials to maintain the migration of various fluids or gases within a man-made structure or system.

The most widely used Geomembranes are made from HDPE (High-Density Polyethylene) as the material has good availability and is fairly low cost.

This liner is extremely beneficial for covering large areas that need high environmental resistance, such as ozone and ultraviolet, along with chemical resistance where quality needs to be at the utmost.

These geomembrane liners are available and delivered in large rolls of 5 to 9 metres in size with the most common application of water and waste management. Each layer is heat welded together in situ by a trained technician to provide an extremely robust and test certified construction.

The HDPE material is available in thicknesses of 100 Micron to 2000 Micron, making it extremely versatile for very large projects while being extremely cost-effective.

Polypropylene liners are available with extremely high tensile and tear strength properties, which provides an extremely rugged material, ideal for extremely steep gradients. The polypropylene material is extremely easy to join, making it very flexible for large areas, can withstand environmental stress cracking and has a high chemical resistance.

Geomembrane liners are designed to reduce any movement of gas or liquid within the application to provide an extremely long-lasting and durable membrane as the main ground layer.

There are many applications, with a few noted below:

Tank Lining

Liners are used to hold a wide variety of liquids within contained area. These liquids can be in the form of fuels, wastewater, general water, gasoline and sludge.

Wastewater Treatment

As part of the wastewater treatment process, water is stored in either storage ponds or evaporation ponds. Liners are used in these ponds to stop any liquid seepage away from the pond.


Geomembrane liners can be fitted into any reservoir, no matter what size or shape. The purpose of the liner is to stop any seepage from leaving the reservoir.

Waste Landfill

It’s important that the materials been filled did not seep into the soil over time. Liners are used at the bottom of the landfill as a barrier layer to prevent the seepage. In some applications, a combination of membrane and clay could be used to provide an extremely rugged application.

There are many other applications where geomembrane liners are used, such as within a sludge pond, floor lining, a crossroads, and more.

Geomembrane liners provide a robust membrane solution that meets all environmental constraints and legislations to provide a solid system.