Keretse niba bisobanuwe ukundi, ibicuruzwa bya fibreglass byaciwe bigomba kubikwa mukarere kwumye, gakonje kandi kitoboza. Ikoreshwa neza mugihe cyamezi 12 nyuma yitariki yo gukora. Fiberglass umugozi waciwe ugomba kuguma mubipaki byabo byumwimerere kugeza mbere yo gukoreshwa. Ibicuruzwa bya fibreglass byaciwe bikwiranye no kugitangwa ninzira yubwato, gari ya moshi, cyangwa ikamyo.