My tent jack is not really holding up well to stove pipe thru it. I found this at Jegs which might be easy button fix to insulate the pipe from the tent jack. I am going to order it and just fender washer screw it to pipe. Its good up to 750 direct heat and 2000 radiant heat. 18x20" so perfect for total pipe wrap.
LINK: Jegs
LINK: Jegs