The Easi Plumb Roll of PTFE (Polytetrafluoroethylene) has been around for may years, but only as a jointing tape for the last two decades or so. It is very low coefficient of friction and a melting point of about 320 degrees Celsius, makes it an ideal substitute for hemp and jointing paste.
Apply the tape by winding it around the thread in the opposite direction to that used to insert the thread into the fitting. Again, experience will determine how much tape to apply, which should be sufficient to be able to screw the thread into the female fitting with a wrench or spanner such that it only really starts to become tight as most of the thread is engaged in the fitting.