I-PTFE powder esebenza kahle kakhulu isetshenziselwa ukusunduza (ukukhama) epayipini, indawo engaphezulu iphathwa ngamakhemikhali, bese ikleliswa eshubhu lensimbi elingenamthungo (ububanzi bangaphandle bomugqa bukhulu kancane kunobubanzi bangaphakathi beshubhu yensimbi engu-1.5 -2mm) ukwakha i-liner engenamthungo.Ukunciphisa ukucindezeleka, ifakwe esithandweni futhi ifudunyezwe kuma-degree angu-180 ukuze iphathwe njalo lokushisa, ukuze ifanele ukusetshenziswa emazingeni okushisa angaphansi kwama-degrees angu-180. Ngesikhathi esifanayo, i-axial amandla aqinile okuphusha (ukukhama) ipayipi lokucindezela ngokusobala angcono kunalawo amapayipi asongayo, angasetshenziswa ephayiphini lomfutho we-micro-negative.