Cov ntaiv fiberglass thiab cov tes tuav yog tsim los ntawm cov txheej txheem pultrusion, thiab sib sau ua ke nrog ntau qhov sib txuas. Lawv muaj cov haujlwm ntawm cov qib ntaiv thiab cov tes tuav. Tsis tas li ntawd, fiberglass ntaiv thiab tes tuav tau tuaj yeem tiv thaiv xeb thiab xeb, yog cov khoom tsim nyog rau cov chaw muaj kabmob.