1,High quality geosyntheitcs clay liner 2,Clay liner have good tightnes,water prood 3,good ... flexbility 4,long water proof capacity2.composition:GCL (Geosynthetic Clay Liners)+geomembrane are high performance needle punched enbironmental reinforced ... 1*10-8m3/m2/secPenetrabilityASTM D 5887≤5*10-9cm/secTension Strength after WettingASTM D 5321≥24Kpa typical 5500g/m2 Geosynthetic Clay liner for landfill