I'd think teflon tape would melt like a cheap plastic bag. After a couple large cooks, any tiny leaks should get sealed up with BBQ gunk.
Modded Brinkmann Gourmet. Basic UDS. Rescued 22.5" OTS. SJS Mini-WSM. Stubbs. B&B Oak Lump.
Cannondale 2009 F8 (for burning off all the great BBQ)