Unsaturated polyester resin ndi imodzi mwazinthu zomwe zimagwiritsidwa ntchito kwambiri ndi thermosetting resin zomwe zimagwira bwino ntchito. Ikhoza kuchiritsidwa kutentha kwa chipinda ndikuwumbidwa pansi pa kupanikizika kwabwino, ndi machitidwe osinthika, makamaka oyenera kupanga zazikulu komanso zapamtunda za FRP. Pambuyo pochiritsa, utomoni umakhala ndi magwiridwe antchito onse, makina ogwiritsira ntchito makina ndi otsika pang'ono kuposa utomoni wa epoxy, koma wabwino kuposa phenolic resin. Kukana dzimbiri, mphamvu zamagetsi ndi retardant lawi posankha kalasi yoyenera ya utomoni kuti ikwaniritse zofunikira za utoto wowala wa utomoni, zitha kupangidwa kukhala zinthu zowonekera. Pali mitundu yambiri, yosinthidwa kwambiri, ndipo mtengo wake ndi wotsika.