Doorashada warqadda la sii daayo ama substrate filimada iyo wakiilka sii deynta ayaa si toos ah u saameeya xasilloonida kaydinta iyo diirinta cajaladda heerkulka sare ee PTFE. Maqaalkani waxa uu isbarbar dhigayaa PET vs. kraft substrates warqadaha iyo silikoon vs. wakiilada sii daayo fluorinated, ku talinaynaa isku darka ugu fiican ee eber-hadha diirinta iyo kalsoonida muddada-dheer.

Cajalado heerkul sare ah oo PTFE ah ayaa si weyn loogu isticmaalaa dahaarka korantada, laakiin heerka-sare iyo xaaladaha korantada sare waxay keenayaan khataro gaar ah: burburka korantada, dheecaanka qayb ahaan, gabowga kulaylka, luminta calaamadaha soo noqnoqda ee sarreeya, iyo dareenka deegaanka. Maqaalkani wuxuu sharxayaa khatar kasta iyo sida looga fogaado.