INSANELY HOT DIY Hot Air Soldering iron @ 15 Volts DC and 3.5 amps...PART II

Step 7 Ultimate insulator...

This mica roll I removed from the inside barrel of the hot air gun...just perfect, to roll up into a smaller size and insert into my scooter handle...be careful in rolling it as this stuff is brittle. This would help shield the main metal barrel from the radiating heat emitted from ceramic tube shown later.