In the process of overhauling the oil boiler's balanced flue outlet.

The circular 100mm dia exhaust flue coming out of the boiler sleeves
into another which goes through the wall. The joint was originally
bound and sealed with a Duck Tape like tape.

The boiler is 1999 vintage, but I can't recall where I obtained the
tape - it may have come with the flue kit.

Presumably it is a special heat resistant type, so normal duct tape
won't do. Anyone know what the tape is called, please? A pointer to a
source would be helpful.

TIA

ironer wrote:
In the process of overhauling the oil boiler's balanced flue outlet.

The circular 100mm dia exhaust flue coming out of the boiler sleeves
into another which goes through the wall. The joint was originally
bound and sealed with a Duck Tape like tape.

The boiler is 1999 vintage, but I can't recall where I obtained the
tape - it may have come with the flue kit.

Presumably it is a special heat resistant type, so normal duct tape
won't do. Anyone know what the tape is called, please? A pointer to
a source would be helpful.

TIA

If it's gas tape, for sealing backplates etc., then any plumber's merchants.