... side is weav geocloth 2,Clay liner have good tightnes,water prood 3,good flexbility 1.Specifications1,one side is geotextile ... ,one side is weav geocloth 2,good tightnes,water prood 3,good flexbility 4,long water proof capacity2.composition:GCL (Geosynthetic Clay Liners ... won't be aging.High expansion rate,high water absorbing capacity,low specific water conductivity.High filter rate,it can self-repair ...