Uma kuqhathaniswa nezinto zendabuko, imikhiqizo ye-fiberglass inezinzuzo ezisobala ekuqineni, ukumelana nokugqwala, ukumelana nokuhuzuka kanye nokubekezelela okushisayo, futhi ingahlangabezana nezidingo zezimoto zamandla angasindi namandla aphezulu.Ngakho-ke, ukusetshenziswa kwayo kwezokuthutha kuyanda.Izicelo: imizimba yezimoto, izihlalo kanye nemizimba yesitimela esinesivinini esikhulu, isakhiwo semikhumbi, isakhiwo semikhumbi, izikebhe, njll.