This may be a dumb question but I installed a 30ft 4 inch chimney liner for a Lopi Pioneer Bay insert. I added the tee which clamps to the liner end. However when the tee goes on the stove flue end there is no clamp. I checked the installation and it made not mention of the clamp so do you just caulk it with the red heat caulk or should I get a tee. The kit I bought was the New England Supply Best Flex 4 inch liner with tee kit. My upstairs insert had the vertical attachment with stainless screws, this does not. Any help would be appreciated. I did turn it on the other night without caulking the tee yet and some embers flew out the tee. It was just a trial run. I did get the 4 inch Simpson Duravent tee as well with this insert as it was used and it appeared the guy caulked the end, but I don't know. Thanks