GCL is Natural Material,well duiability,non-toxicity,no corrosion,and ... products ideal for many projects.Features:GCL is Natural Material,well duiability,non-toxicity,no corrosion,and it ... area ASTM D 5993 ≥4.8kg/m2Tension Strength ASTM D 4632 ≥400N Peeling Strength ASTM D 4632 ≥75N Indicating flow ... Penetrability ASTM D 5887 ≤5*10-9cm/sec Tension Strength after Wetting ASTM D 5321 ≥24Kpa typical GCL( ...