12mm & 25mm  x 3mm BLACK Flat Gasket / Sealing Tape / Self Adhesive. 

• For use with Woodburning stoves, to seal around vitreous pipes giving a gas tight seal when installing or as a seal against glass.
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• High temperature
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• Suitable for Woodburners, Stoves, and other solid fuel burning Heaters.
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• This gasket is ideal for between your glass and door casing creating a gas tight seal against the door.

                                                  Sold my the Metre.