My stove sits on a hearth with the flue pipe through the chimney. I have a blockoff plate on the bottom of the chimney where the flue pipe goes through. What type of sealant should be used between the blockoff plate and the flue pipe? It has to be high temperature enough and allow for expansion of the flue. Could rock wool be stuffed around the pipe instead of using sealant?
Thanks in advance
Thanks in advance