A/C Box sealant

Discussion in 'Interior City' started by Rob72GS, Dec 23, 2022.

  1. Rob72GS

    Rob72GS Well-Known Member

    what was the sealant or best sealant to use to reseal the ox the the firewall and each half?
     
    Rob72GS, Dec 23, 2022
    #1
  2. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    I use duct seal (dum dum) and roll it into a 1/4” bead. Lay it on the edge and slap it together. I’m sure there will be several answers for this, though.
     
    Smartin, Dec 23, 2022
    #2
  3. Buicksky

    Buicksky Gold Level Contributor

    I agree with Adam that's how I did mine as well.
     
    Buicksky, Dec 23, 2022
    #3
  4. bostoncat68

    bostoncat68 Platinum Level Contributor

    I used dum dum but if I was doing it now I would use mortite. You can get it at any big box store. It’s a lot less messy than dum dum and also never hardens. Great stuff
     
    bostoncat68, Dec 23, 2022
    #4
  5. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    The only time I’ve ever seen duct seal harden is if it’s been cooking in the sun for 10 years.
     
    Smartin, Dec 23, 2022
    #5
    Matt Knutson likes this.
  6. Fred Hickey

    Fred Hickey Founders Club Member

    E6AE636E-6B6A-4E4D-9054-60457F22B6C5.jpeg F454EA77-5713-4936-9C17-A7419D72ADFF.jpeg Last sealant/ gasket kit I bought was junk, thin as tissue paper
     

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    Fred Hickey, Dec 24, 2022
    #6
  7. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    That's the stuff.
     
    Smartin, Dec 24, 2022
    #7
  8. Daves69

    Daves69 Too many cars too work on

    3m Makes a black strip caulking part number 08578.

    Have used this many times.



    [​IMG]
     
    Daves69, Dec 24, 2022
    #8
    Brett Slater, GSX10/10 and Smartin like this.
  9. jaye

    jaye Well-Known Member

    I also used 3m strip seal , it stays soft but hold really well
     
    jaye, Dec 24, 2022
    #9
  10. Smartin

    Smartin antiqueautomotiveservice.com Staff Member

    I may have to give that a shot. Using the duct seal is kind of a pain in the arse having to roll it into 1/4" beads.
     
    Smartin, Dec 24, 2022
    #10
  11. Redmanf1

    Redmanf1 Gold Level Contributor

    What Dave posted works well...
     
    Redmanf1, Dec 25, 2022
    #11

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