I-Silicone\/PTFE (Polytetrafluoroethylene) septa, eyaziwa nangokuthi ama-silicone\/PTFE liner noma amakepisi, ivamise ukusetshenziswa kulabhorethri kanye namakhemikhali okuhlaziya ukuze kuvalwe izitsha zesampula noma iziqukathi. Lawa ma-septa ahlinzeka ngophawu oluvikelekile noluthembekile ukuvimbela ukuhwamuka kwesampula noma ukungcoliswa.I-Silicone\/PTFE septa isetshenziswa kakhulu ezinhlelweni ezifana ne-gas chromatography (GC), i-liquid chromatography (LC), ukuhlaziywa kwe-headspace, nokugcinwa kwesampula. Atholakala ngamasayizi ahlukene kanye nokucushwa ukuze alingane nezinhlobo ezithile zebhodlela noma iziqukathi, okuqinisekisa uphawu oluvikelekile noluthembekile lwezinqubo ezihlukahlukene zaselabhorethri.