Spec sheet for HDPE Geomembrane - smooth Test values Units Test method-ASTM Property 1.0 1.3 1.5 mm D 5199 Thickness 0.94 0.94 0.94 g/cm³ D 1505 Density (min.)         D 638  Type IV Tensile properties 15 19 22 kN/m " -Yield strength 27 35 40 kN/m " - Break strength 12 12 12 % " - Yield elongation 700 700 700 % " - Break elongation 125 162 187 N D 1004 Tear resistance 320 420 480 N D 4833 Puncture resistance 200 200 200 hr D 5397 Stress crack resistance 2 2 2 % D 1603 Carbon black content 1,2 1,2 1,2 Cat. D 5596 Carbon black dispersion 100 100 100 min D 3895 Oxidative induction time (OIT) Minimum values