Kev sib sau ua ke ntawm fiberglass roving rau tshuaj tsuag yog coated nrog raws li qhov loj me, sib xws nrog unsaturated polyester thiab yas ester resins. Tom qab ntawd nws raug txiav los ntawm chopper, txau nrog cov resin ntawm cov pwm, thiab dov, uas yog tsim nyog los ntub cov resin rau hauv cov fibers thiab tshem tawm cov npuas npuas. Thaum kawg, cov iav-resin sib tov yog kho rau hauv cov khoom.