[Shop-talk] Dum-Dum

[John Mitchell]

3M makes black strip caulk.

On 4/5/2026 6:55 PM, Eric Russell wrote:
> Try an RV supplier.  There is probably an official name for it but 
> I've always called it dum-dum...
>
> EjR
>
> On Sun, Apr 5, 2026, 6:49 PM Jeff Scarbrough <fishplate at gmail.com> wrote:
>
>     Working on my 50 year old Triumph Spitfire, and I'm looking for
>     the sealer that is used between the master cylinder bracket and
>     the firewall.  We always called it dum-dum.  It came in
>     pencil-sized strips liked up on heavy waxed paper.
>
>     But when I go to the FLAPS and ask for dum-dum, they look at me
>     like I'm doomed sort of dum-dum.
>
>     Is there another name for this stuff?
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