No. Duct tape is worthless in area where there will be heat. It is not
designed for long term use of any kind. It was originally designed for
securing coverings over equipment while it was shipped in WWII.
Visit the heating and cooling department and secure some tape made for
ducts. It comes in several flavors, but it generally has a shinny aluminum
cover (metal not cloth) and the adhesive is covered with a tape that has to
be removed and discarded.
Do not secure with screws. They collect lint on the inside of the pipe.
You've got the time period right, but the usage wrong. The Johnson and
Johnson Permacel Division made it for the U.S. Military during World War
II, but the original use was to keep the moisture out of the ammunition
cases. Because it was waterproof, soldiers referred to the tape as "Duck
Go back and take a look at a few of those installations that are two to
five years old. Take a good look at the condition of the tape.
If you are doing 1000's. then I would guess you are working as a
professional. Give your customers a professional job, spend the extra
dollar or two and get the right stuff.
Ok, not to argue but that was then and they've held up fine for 20
years. The dryer vents do not reach a temperature high enough to destroy
the duct tape, at least not as long as I've been working on them. I believe
it has to have been at least ten years ago now that duct tape was no longer
allowed on duct. I now use venture tape, Caulk tape and heat tape. On
dryer vents I now use heat tape (foil) and it is heated when applied to the
pipe. Actually duct tape may still be allowed on dryer pipe here but
haven't used it for quite awhile. About the only thing I use duct tape for
anymore is to tape cuts and wounds... :)
I did use the high grade tapes, I would send it back anytime they tried
to pawn of the cheap stuff on me. The loss of quality in duct tape may have
been a determining factor as why some would last when others wouldn't and
that may also be the reason it was is longer accepted as good enough for
The proper name for duct tape is duct insulators tape. It was
originally used to hold the cloth covers that were sewn in place over
applied insulation while they were being sewn. Using the tape directly
on the metal ducting has always been a misuse because the tape is
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