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Sealing heating ducts dicko 11-23-2007
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Posted by dicko on November 23, 2007, 9:27 am
Last weeks Ask This Old House episode had an item about sealing
heating ducts. They mentioned that you shouldnt use use Duck Tape to
do the sealing because the adhesive dries out after a few years. They
said to use metallic tape instead.

My question is, why doesnt the metallic tape adhesive dry out too? Is
it different from that used on Duck Tape?

I'm also wondering why I couldnt just use the tape used to seal the
joints in Tyvek house wrap. Its supposed to last many many years and
it sure is tenacious and sticks to anything.

-dickm



AppliancePartsPros.com, Inc.
Posted by Edwin Pawlowski on November 23, 2007, 9:51 am

> Last weeks Ask This Old House episode had an item about sealing
> heating ducts. They mentioned that you shouldnt use use Duck Tape to
> do the sealing because the adhesive dries out after a few years. They
> said to use metallic tape instead.
>
> My question is, why doesnt the metallic tape adhesive dry out too? Is
> it different from that used on Duck Tape?
>
> I'm also wondering why I couldnt just use the tape used to seal the
> joints in Tyvek house wrap. Its supposed to last many many years and
> it sure is tenacious and sticks to anything.
>
> -dickm

There are thousands of types of adhesives for many different uses. Use the
one appropriate for your situation for best results. The Tyvek tape may or
may not hold up on sheet metal that is heated. Just don't bitch if it does
not work. I doubt an of us here know the proprietary formulations of the
different tapes to give you the definitive answer.



Posted by J.A. Michel on November 23, 2007, 10:17 am

> Last weeks Ask This Old House episode had an item about sealing
> heating ducts. They mentioned that you shouldnt use use Duck Tape to
> do the sealing because the adhesive dries out after a few years. They
> said to use metallic tape instead.
>
> My question is, why doesnt the metallic tape adhesive dry out too? Is
> it different from that used on Duck Tape?
>
> I'm also wondering why I couldnt just use the tape used to seal the
> joints in Tyvek house wrap. Its supposed to last many many years and
> it sure is tenacious and sticks to anything.
>
> -dickm
>
>

Metal tape is VERY sticky, and has the added benefit of crimping and
crunching down on small openings. It's what you should use on ducts.


Posted by Mark on November 23, 2007, 8:29 pm

>
>> Last weeks Ask This Old House episode had an item about sealing
>> heating ducts. They mentioned that you shouldnt use use Duck Tape to
>> do the sealing because the adhesive dries out after a few years. They
>> said to use metallic tape instead.
>>
>> My question is, why doesnt the metallic tape adhesive dry out too? Is
>> it different from that used on Duck Tape?
>>
>> I'm also wondering why I couldnt just use the tape used to seal the
>> joints in Tyvek house wrap. Its supposed to last many many years and
>> it sure is tenacious and sticks to anything.
>>
>> -dickm
>>
>>
>
> Metal tape is VERY sticky, and has the added benefit of crimping and
> crunching down on small openings. It's what you should use on ducts.
So sticky that it comes with a waxy paper backing that you remove prior to
using. Once it sticks, it's on to stay - even to itself. I found it
easiest to cut the piece the length needed, then start pealing just the end
of the tape. Stick that end straight and square, and with the rest of the
piece laying in place, peal the rest of the backing paper off as you press
the tape in place.


Posted by Red Green on November 23, 2007, 11:55 am

> Last weeks Ask This Old House episode had an item about sealing
> heating ducts. They mentioned that you shouldnt use use Duck Tape to
> do the sealing because the adhesive dries out after a few years. They
> said to use metallic tape instead.
>
> My question is, why doesnt the metallic tape adhesive dry out too? Is
> it different from that used on Duck Tape?

Different tape material and glues.

>
> I'm also wondering why I couldnt just use the tape used to seal the
> joints in Tyvek house wrap.

You could. You could also use $1 a roll Mainstays clear tape from Wal-
Mart. Tyvek house wrap is for Tyvek.

> Its supposed to last many many years

On Tyvek I bet you're right.

> and
> it sure is tenacious and sticks to anything.

For some period of time, I bet you're right...day, week, month, year,
years.

>
> -dickm
>
>

See http://covalenceadhesives.com [HVAC tab] for proper stuff for your
application.

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