I have used duct tape at one time or another, and absolutely hate the stuff for any long term dependability. It shrinks, pulls away, allows water to affect the adhesive qualities and in general; sucks swamp water.

For any kind of sealing that requires a tape, I have always used the aluminum tape with a polymer adhesive on it. The only long term test I have ever put it through where I could monitor it is on my own homes furnace installation, and it still looks great and seals great after 16 years on the ducts. I even have some small openings on the plenum that attaches directly to the furnace and gets readily hot covered. It hasn't melted, dried up, seperated, or peeled back.

I have tried most every brand of duct tape I can find in the Milwaukee area with no improvement in performance. Does anyone have a specific brand and product number that has worked well for them?

Bountyhunter