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Technical Need a source or P/N for GM gray caulk/sealer/play-dough

Discussion in 'The Hokey Ass Message Board' started by lewk, Nov 27, 2022.

  1. lewk
    Joined: Apr 8, 2011
    Posts: 1,008

    lewk
    Member
    from Mt

    Alright, stupid question time…. I’m doing the cowl area on my ‘60 ElCo and need a source for that gray sticky play dough goo they used everywhere on old GM stuff. It’s different than seam sealer and the tar they used. It stays pliable so that things can come apart later. It’s under trim, filling gaps, everywhere. I need it for dash trim and kick panel vents now, everything else later. What is that stuff? What’s an easy source?
    I don’t wanna spend the whole day wading through random forums reading Vette guys arguing, so I thought I’d just ask y’all.
     
  2. Lone Star Mopar
    Joined: Nov 2, 2005
    Posts: 3,811

    Lone Star Mopar
    Member

    This stuff ? Screenshot_20221127-145501_Chrome.jpg
     
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  3. lewk
    Joined: Apr 8, 2011
    Posts: 1,008

    lewk
    Member
    from Mt

    A buddy I reached out to is calling it Dum Dum Putty, and saying it isn’t as sticky as the butyl so it comes apart easier when you need to service stuff.
     
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  4. The 3 M is not like we had in the factory back in 64. 3 m changed their Chalk a few years back. This is not the same now. Ours came form Mortel. Best ever stuff.
     
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  5. SS327
    Joined: Sep 11, 2017
    Posts: 2,469

    SS327

    Yup, Dum Dum. It’s not that great at sealing and will harden, crack and shrink with enough time. I know I fixed a lot of water leaks because of that stuff under warranty.
     
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  6. deuceman32
    Joined: Oct 23, 2007
    Posts: 459

    deuceman32
    Member

  7. I’m the late 90s at the Chevy dealer I worked at we used 3M strip caulk. Worked just as well as the old stuff. You needed it to seal up any GM acc/heater box under the dash.
     
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  8. Joe Blow
    Joined: Oct 29, 2016
    Posts: 1,480

    Joe Blow
    Member

    Have always used Duct Seal. Does everything you specified.....play dough like, stays pliable, reusable and gray. 8 bucks for a 1 lb. stick on Amazon. Electric line departments have used it for years.
    15301Nashua-102.jpg
     
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  9. gregsmy
    Joined: Feb 11, 2011
    Posts: 140

    gregsmy
    Member
    from Florida

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  10. lewk
    Joined: Apr 8, 2011
    Posts: 1,008

    lewk
    Member
    from Mt

    There it is. I guess this dum dum is headed for Home Depot. Thanks for the help guys!
     
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  11. Mr48chev
    Joined: Dec 28, 2007
    Posts: 33,861

    Mr48chev
    ALLIANCE MEMBER

    I used to use the gray all the time but am not finding a number for it.
     
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  12. stuart in mn
    Joined: Nov 22, 2007
    Posts: 2,406

    stuart in mn
    Member

    The 3M strip caulk is black, but it's good stuff and it doesn't get hard. It's available at most auto parts stores.
     
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