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Old 12-19-2011, 01:56 AM   #1
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What to seal ducts with in unconditioned space - foil tape? mastic?


If you have ducts running through your basement or attic what do you think is better at sealing them? Is one easier or more effective than the other? Mastic would just be painted on the duct seams with a brush correct?
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Old 12-19-2011, 04:22 AM   #2
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What to seal ducts with in unconditioned space - foil tape? mastic?


Mastic brush applied, or mastic tape.
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Old 12-19-2011, 10:21 AM   #3
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What to seal ducts with in unconditioned space - foil tape? mastic?


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What to seal ducts with in unconditioned space - foil tape? mastic?
Now what do you think would be advisable?
No really...which do you think would be the answer?

1. Foil tape? (made for just this purpose and not effected by heat)
2. Paint on mastic? (made for what application)

If you were to name some products this would go a lot better for you.
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Old 12-19-2011, 10:30 AM   #4
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What to seal ducts with in unconditioned space - foil tape? mastic?


Carlisle Hardcast foil tape.
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Old 12-19-2011, 03:59 PM   #5
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What to seal ducts with in unconditioned space - foil tape? mastic?


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Originally Posted by Bud Cline View Post
Now what do you think would be advisable?
No really...which do you think would be the answer?

1. Foil tape? (made for just this purpose and not effected by heat)
2. Paint on mastic? (made for what application)

If you were to name some products this would go a lot better for you.

Not all UL181 foil tape is actually good for sealing.
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