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Using the latest Zedex technology, Visqueen High Performance Urban Drainage Geomembrane is flexible, has high puncture resistance and suitable for non-smooth surfaces and factory prefabrication to optimise on site installation. The product is black in colour, 1mm thick and supplied in an easy to handle roll size of 1.4m x 50m. Visqueen High Performance Urban Drainage Geomembrane is a catagory 2 impermeable membrane under BS 7533 part 13.