This silicone Chimney boot is designed to be used with double wall insulated chimney. We recommend the type with 1" insulation - 6" inner and 8" outer diameter which fits most wood stoves. It is installed with roofing screws through the dome cover and screws into a backing on the inside while sealing with silicone or Lexel.
A vinyl flashing can be glued with the specialized glue provided to make sure there is no risk of leaks.
Smaller sizes are available for Pellet and Gas stove vents that can go straight up or through the side wall.