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  1. #1
    Join Date
    Jun 2008
    Posts
    3

    Duck tape or metal tape?

    Is duck tape ever ok for connecting ductwork to the plenum? Or is metal tape the best way to seal for many leaks?

  2. #2
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,914
    Mastic
    If more government is the answer, then it's a really stupid question.

  3. #3
    Join Date
    Jun 2008
    Location
    Phoenix, AZ
    Posts
    70
    yeah, I'll strap it, tape it with venture tape and seal it with mastic... I see duct with duct tape come off all the time...

  4. #4
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,914
    Quote Originally Posted by dj3901783 View Post
    yeah, I'll strap it, tape it with venture tape and seal it with mastic... I see duct with duct tape come off all the time...
    I skip the tape part, kinda pointless with a strap and mastic. A lot of tapes will also release if you cover them with mastic.

    I don't use any of the traditional duct tape looking products for anything. I don't think I even own any. I have 3 different kinds of tape I use on duct systems, none of them look like "duct tape".

    The closest thing I have to "duct tape" is the rubber impregnated canvas "Gaffers Tape" I use for bundling refrigerant line sets together.
    If more government is the answer, then it's a really stupid question.

  5. #5
    Join Date
    Dec 2007
    Location
    Cedar Grove, Wi-Sheboygan
    Posts
    1,582
    Buy the metal tape that is made from heavy gauge metal is usuallt better than the thin metal tape, The thin metal tape is ok to use on flex duct but the heavy tape is much better an IMO has better adhesive. Mastic NO.9 is good to use as well, very easy to apply with a small brush on most typical seams, anything bigger use a good high heat resitive silicone.

  6. #6
    Join Date
    Feb 2003
    Location
    Huntsville,AL
    Posts
    4,125
    I used HVAC mastic on all my joints & seams &holes --

    oh yeh, I will bet anyone $100 that they can not remove the 'duct' tape on my pipe joints without scraping without abraiding the stuff away!! applied in 1974, I am sure -- [sure wish I knew what brand & catalogue number!]
    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

  7. #7
    Join Date
    Mar 2008
    Posts
    657
    mastic is the best. if you mean connecting flex duct to a start collar i use two 3ft large zip ties. manufacturer sugg. connecting flex part by zip ties and insulation with duct tape. go figure
    "The things you own end up owning you. "

    Tyler Durden

  8. #8
    Join Date
    Jan 2008
    Location
    BAYOU LAND
    Posts
    697
    Quote Originally Posted by badboyheel View Post
    mastic is the best. if you mean connecting flex duct to a start collar i use two 3ft large zip ties. manufacturer sugg. connecting flex part by zip ties and insulation with duct tape. go figure
    WINDOW WRAP,lol...........actually seen this on a plenum last week


    actually I like mastic or caulk
    The government works for me. I do not answer to them, they answer to me.

    we need a few more sheep dogs to keep barking at the wolves,and the stupid sheep

    A well-regulated militia, being necessary to the security of a free State, the right of the people to keep and bear arms, shall not be infringed.

  9. #9
    Join Date
    Jun 2008
    Posts
    19
    What leaks? The Doc says always dog ear your s-cleats. If you gotta run duct out side though water based is the best.

  10. #10
    Join Date
    Mar 2002
    Location
    Richmond, Virginia
    Posts
    4,264
    Ductdoc, can you elaborate on "dog earing" the s-cleats?
    There is nothing more frightful than ignorance in action....Mark Twain

  11. #11
    Join Date
    Jun 2008
    Posts
    19
    Cut your cleat two 2" longer than your duct.

    Snip two of the three folds 1" back on both ends.

    Round off the edges to resemble a "dogs ear".

    You the have an inch to fold over your corner.

    Pop a screw in to pull it tight.

    The end result should resemble a drive cleat "nice and neat"

  12. #12
    Join Date
    Apr 2007
    Posts
    6,285
    Mastic.......it's like the same price and you don't have to worry about seams with duct tape falling apart and having to clean them off.

  13. #13
    Join Date
    Mar 2002
    Location
    Richmond, Virginia
    Posts
    4,264
    Thanks ductdoc. I'll have to give that a try. I agree with the others regarding mastic to seal many leaks Katyinspector.
    There is nothing more frightful than ignorance in action....Mark Twain

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