Resin polyester mara cikawa shine nau'in resin thermosetting da aka fi amfani da shi, wanda gabaɗaya mahaɗin polymer ne mai layi tare da haɗin ester da haɗin biyu mara cikawa wanda aka samar ta hanyar haɗa dicarboxylic acid mara cikawa tare da diols ko dicarboxylic acid mai cikawa tare da diols mara cikawa. Yawanci, ana aiwatar da aikin haɗin polyester a 190-220 ℃ har sai an kai ƙimar acid da ake tsammani (ko danko). Bayan an kammala aikin haɗin polyester, ana ƙara wani adadin vinyl monomer yayin zafi don shirya ruwa mai kauri. Ana kiran wannan maganin polymer resin polyester mara cikawa.
Resin polyester mara cika ya sami babban nasara a fannoni da yawa na masana'antu, kamar a cikin kera jiragen ruwa na windsurfing da jiragen ruwa a wasannin ruwa. Wannan polymer koyaushe yana cikin ginshiƙin juyin juya halin gaske a masana'antar gina jiragen ruwa, domin yana iya samar da kyakkyawan aiki da sassauci sosai a amfani.
Ana kuma amfani da resin polyester mara cika a masana'antar kera motoci saboda sauƙin amfani da su, nauyinsu mai sauƙi, ƙarancin farashin tsarin, da ƙarancin ƙarfin injina.
Ana kuma amfani da wannan kayan a gine-gine, musamman wajen ƙera kayan girki, murhu, tayal ɗin rufi, kayan haɗin banɗaki, da kuma bututu da tankunan ruwa.
Amfani da resin polyester mara cikawa ya sha bamban. Resin polyester a zahiri yana wakiltar ɗaya daga cikin mafi kyawun
mahadi da ake amfani da su a fannoni daban-daban na masana'antu. Mafi mahimmanci, da waɗanda aka nuna a sama, sune:
* Kayan haɗin gwiwa
* Fentin itace
* Faifan da aka yi wa laminated lebur, faifan da aka yi wa corrugated, faifan da aka yi wa ribbon
* Gel coat don jiragen ruwa, motoci da kayan wanka
* Man shafawa, abubuwan cikawa, stucco, putties da kuma abubuwan da aka haɗa da sinadarai
* Kayan haɗin kai masu kashe kansa
* Quartz, marmara da siminti na wucin gadi