Zopangira zazikulu za HDPE zopindika pakhoma kawiri ndizolimba kwambiri polyethylene, chitolirochi chimatulutsidwa ndi co-extrusion extruder kuchokera mkati ndi kunja motsatana, khoma lamkati ndilosalala komanso khoma lakunja ndi trapezoidal.
Pali chosanjikiza chopanda pakati pa khoma lamkati ndi lakunja. Zogulitsa zili ndi zabwino zosiyanasiyana monga kuuma kwa mphete, kulimba, kulemera pang'ono, kupopera phokoso, kukhazikika kwa UV, moyo wautali komanso kupindika kwabwino, anti-kuthamanga, mphamvu yayikulu yamphamvu ndi zina zotero. Itha kugwiritsidwa ntchito m'magawo osauka a geological, ndiye njira yabwino m'malo mwa mapaipi achikhalidwe a zimbudzi.