I ask because when I installed my pipe, it had a small leak. Now the pipe is the pellet vent pro stuff that is supposed to seal itself and has o-rings inside each connection. For whatever reason one joint didn't seal and had a bit of smoke pushing out. However, I could not get the pipe back apart to put sealant inside, so I just put the sealant on the outside. I've been running the stove for about a week and I'm just curious if that small leak will leak enough heat into the airspace built into the pipe to cause any problems. On max, the pipe gets too hot to touch after a few hours. If I touch the metal on the thimble about 1 inch away, it's just almost too hot to touch, but still cool enough to bear without burning yourself. Does that sound about right?