Ana amfani da filaye na polypropylene sosai a cikin kankare don haɓaka ƙarfinsa, ƙarfinsa, da juriya. Ana ƙara waɗannan zaruruwa zuwa gaurayar kankare don rage ɓarnawar raguwa, ƙara juriya mai tasiri, da haɓaka ƙarfin ƙarfi. Hakanan suna haɓaka juriya na wuta ta hanyar rage spalling ƙarƙashin yanayin zafi. Zaɓuɓɓukan polypropylene suna aiki azaman ƙarfafawa, suna sa sifofin simintin su zama masu dorewa da juriya ga lalacewa da tsagewa. Aikace-aikacen gama gari sun haɗa da pavements, tunnels, gadoji, da benayen masana'antu inda ake buƙatar babban aiki da tsawon rai.