PolyLock la taaban karo, sidoo kale loo yaqaan E-lock ama polylock, oo ka samaysan HDPE, E-qaabeeya, ayaa ku habboon in si adag loogu xidho shubka. Waxaa lagu shubaa ama lagu dhejiyaa shubka qoyan marka la isticmaalayo, dusha alxanka ee bannaan, geomembrane si fudud ayaa loogu alxan karaa. Dusha siman ee ballaciisu yahay 15cm ama 10cm ayaa loogu talagalay alxanka go'yaasha polyetylenka halka faraha dhererka 3-4cm loo isticmaalo in la geliyo shubka webka si loo xiro oo loo hagaajiyo wadajirka geomembrane si loo sameeyo bangi dhamaystiran oo aan biyuhu lahayn.