Ko te PolyLock Raima, e kiia ana ko E-raka, polylock ranei, he mea hanga ki te HDPE, te ahua-E, he pai mo te punga i roto i te raima. Ka makahia, ka whakauruhia ranei ki roto i te raima maku i te wa e whakamahi ana, mo te mata o te mata o te raima, ka taea te paiherea te geomembrane ki runga. Ko te mata maeneene me te whanui 15cm, 10cm ranei mo te whakapiri i nga pepa polyethylene ka whakamahia nga maihao 3-4cm te teitei ki te whakauru i te raima tukutuku kia maukati ki roto me te whakatika i te hononga ki te geomembrane kia pai ai te peeke wai.