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.
Rescued 22.5" OTS. SJS Mini-WSM. HEB briqs (rebranded Royal Oak). Pecan/Hickory/Cherry/Apple/Peach woods.
2016 Fuji Absolute 2.0 LE (for burning off all the great BBQ)