What do you use to secure your muffler and pipe to make sure it doesn't come off in flight?

CA Glue?
Lock-Tite?
Duck Tape?
Rubbery Silicon?

I need to know for real.....

Please reply,

loctite

After iit has run for a little bit and gotten real hot, I snug up the jam nuts again. I do this around three times then I have no more trouble

Thank you for the replys

It needs to be high temp thread locking formula. The muffler gets very hot.

I been using this thread lock......

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXC030

What better type should I use and who sells it?

I've had good luck with high temperature never-seize. I also do it with the engine hot.