On Fri, 23 Nov 2007 14:36:47 -0500, wrote:

On Fri, 23 Nov 2007 14:27:49 GMT, dicko
wrote:

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


Check with your utility. Some will subsidize a professional "mastic"
job or just pay for it outright. That is a lot better than any tape.


Thanks for all your comments.

I have a bucket of the duct mastic too. I was going to use that on the
non-round, irregular duct joints.

I'll use the metal tape, but the roll of tape I bought is not called
HVAC tape or anything like that. Its just plain metal tape. Does that
make a difference?

I'm also going to do an easy to access joint with the Tyvek tape, just
as a test. If anyone's still around in a few years time, I'll report
back :-)

-dickm