Every year I have put high temp silicone at the pipe to stove connection point on my Harman Accentra. This connection is very hard to disconnect in the spring. The configuration of the hook up makes it impossible to twist the connection. The other sections are siliconed and do not need to be taken apart for cleaning. Is it hooked into a old wood stove thimble in a center chimney set up. I have concerns about the connection getting loose due to the slight vibrations from the various motors and fans. Is pipe with built in gaskets a better option here? It would set me back a couple of hundred to change out to the new pipe with gaskets.