Just curious what you prefer. Mine only has some insulation behind the main plate, and I don't think it's all that air tight, since I get such hot fires, which is great, but end up blowing through my wood pile and having to reload way too much. Was curious about the caulk like high tempt stuff. I don't want to mess up the brick after applying this when it comes to having to move the stove out in order to clean the chimney every other year or so. Is it hard to get off? I could see myself having to "chip" at it in order to clean the old off in order to reseal it, and somewhat scares me. Also, do you seal next to the stove as well as the outside of the insert plate? I don't have a tubed liner or anything, just stove hole, and up the masonry outside chimney.