Regarding all the round sheet metal duct work exiting our typical gas fired,
hot air heating
What's the best way to seal these duct joints, at least where one can
actually see them ?
Duct tape doesn't really sound like the best way to go.
Would appreciate any suggestions as to brands, etc.
I guess I should also ask:
Is it necessary to do so for the hot air ducts ?
How about for the duct leading to roof flue exhaust (no fireplace in house)