E faia i le polyethylene resin ma le ethylene copolymer e fai ma mea mata ma faʻaopoopo mea faʻaopoopo eseese.O loʻo i ai uiga o le maualuga o le anti-seepage coefficient, lelei vailaʻau faʻamautu, matua teteʻe, aʻa aʻa teteʻe, manuia lelei tau tamaoaiga, vave fausia vave, puipuiga o le siosiomaga ma non-toxicity.