Just wondering how many of you use a sealer on you stove pipe inside house. I have the black standard stove pipe running to a triple wall "thru the ceiling" When we first put it together the other day, it appeared to have gaps where they joined together. I did put 3 screws in the connections, 120* apart. Ended up using a stove cement on the joints, but it is too hard and seems you can hear it pop when it heats/cools. I would like to find something that can handle the heat and still flex. I know I have a very small leak at the junction between the pipe and the adapter that pushes into the box in the ceiling. Some of the cement that was put on the joints the other day, seem to have minor cracks in it.