I have custom made fep thicker
with built in glue. Contact me off list at firstname.lastname@example.org
Mine is 4.5 inches wide by 12 inches long... enough for 2 trays.
Works best on glass as it can be scraped off of glass, then clean the glass surface and re-apply. You do not need to remove the glass from the tray.
Works best on aluminum trays.
Putting the material on is tricky. If you get small air bubbles, do not try to Prick them to release the air... that does not work ...just put it on the machine and run a 50xy Calibration print. The heat from the printing will cause the airpockets to flatten and dissapear.
I have some stock of this material...