Zida za polyolefin zopanda utsi wa halogen-free zimagwira ntchito yofunika kwambiri pakupanga chingwe cha kuwala, makamaka m'malo omwe ali ndi zofunikira zotetezera moto, monga subways, tunnel, nyumba zokwera kwambiri, machitidwe amagetsi, ndi zina zotero, zomwe sizingapereke zofunikira zokha. ntchito zoyankhulirana, komanso kuchepetsa chiwopsezo cha chitetezo cha ogwira ntchito komanso chilengedwe pakagwa ngozi!