Andy J Posted May 28, 2022 Share Posted May 28, 2022 When I disassembled my '51 Pontiac,there was some type of putty or sealant on all the bolts and screws that went into the body and firewall.I'm assuming this was some type of water proofing putty under all the hood hinges and door hinges.This substance was light gray in color and was still soft and pliable,even after all these years.Does anyone know what this stuff is called and can it still be purchased today?I certainly intend to use something of this nature on reassembly,of which I'm in the process of doing now. Any thoughts,opinions,or advice will be greatly appreciated. Link to comment Share on other sites More sharing options...
EmTee Posted May 28, 2022 Share Posted May 28, 2022 Something like this: https://www.3m.com/3M/en_US/p/d/b40069454/ ? Link to comment Share on other sites More sharing options...
Andy J Posted May 28, 2022 Author Share Posted May 28, 2022 EmTee,that is exactly what I used to seal up the new metal pieces I replaced.This stuff I'm referring to isn't paintable and doesn't skim over and cure.It is sort of sticky and doesn't dry out.However,I don't see why regular seam sealer wouldn't work because it is certainly water proof. Link to comment Share on other sites More sharing options...
EmTee Posted May 28, 2022 Share Posted May 28, 2022 Hmmmm... I don't know why you couldn't use a dollop of that seam sealer and then bolt the pieces together. Excess that squeezes out can be wiped off or (as I would do) left and then painted. Is that how the original goop was applied? Link to comment Share on other sites More sharing options...
Bloo Posted May 28, 2022 Share Posted May 28, 2022 2 hours ago, Andy J said: This substance was light gray in color and was still soft and pliable,even after all these years. I believe it is called "Dum-Dum". I swear I didn't make that up. Strip caulk might work. 1 Link to comment Share on other sites More sharing options...
Rusty_OToole Posted May 28, 2022 Share Posted May 28, 2022 Dum dum is what it was called. If it has a fibrous texture it probably contains asbestos. Not a big worry as long as you don't try to grind it off. But you should be aware that it is there. 1 Link to comment Share on other sites More sharing options...
EmTee Posted May 28, 2022 Share Posted May 28, 2022 OK, my father called it 'monkey sh*t'... Anyway, you might also look at this: https://www.supplyhouse.com/DiversiTech-6-202-2-DiversiGum-Sealing-Compound-2-lb-Slug?utm_source=google_ad&utm_medium=Shopping_tm&utm_campaign=Shopping_TM_LPLTV&gclid=EAIaIQobChMIi76HlIeC-AIVTfvICh120QzHEAQYBCABEgIVJ_D_BwE . Really sticky stuff... 1 1 Link to comment Share on other sites More sharing options...
Pete O Posted May 28, 2022 Share Posted May 28, 2022 Home Depot carries dum dum in their electrical department. It's used for sealing holes where wires/conduits pass through exterior walls. 2 Link to comment Share on other sites More sharing options...
Frank DuVal Posted May 29, 2022 Share Posted May 29, 2022 You are talking Duct Seal: https://www.homedepot.com/p/Gardner-Bender-1-lb-Plug-Duct-Seal-Compound-DS-110/100212441 I would use strip caulk on cars. I use Duct Seal on electrical holes where I can stand the grey hands from rolling it to make it soft. 😲 1 Link to comment Share on other sites More sharing options...
Andy J Posted June 4, 2022 Author Share Posted June 4, 2022 Amazon has the dumdum putty,so I ordered it today.I hope it's what I need. Link to comment Share on other sites More sharing options...
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