I am going to hook up my new to me pellet stove this weekend. As far as I can tell the 4 inch stainless pipe goes over the outlet in the stove. I purchased a 4 inch to 6 inch conversion because I already had a 6 inch pipe in the chimney. My question is this do I need to use any high temp putty at the stove to pipe junction or the pipe to conversion junctions? Thanks!