Urban Drainage GeoMembrane is a flexible membrane only available from us in the one size of 4m x 12.5m. This product is made from high performing polymers to create an impermeable membrane that is suitable for underground stormwater storage. It can also be used in paving systems. As well as for geomembrane applications including the wrapping of underground stormwater attenuation crates in light duty situations. It helps to prevent water from passing into the sub-grade which in turn preserves its structural integrity. It is easy to install and can be bonded at the joins with tape or it can be welded depending on your preference and need. It also has great anti-puncture properties. This product is often used with AquaCell systems for the control and temporary storage of surging water..