In the process of replacing rusted panels in the engine bay I found where seams were covered with a kind of "stuff" to seal the joints I guess. In some cases I've even found what looks like chewing gum in various holes. Does anyone know what this sealant is called and where I get some to finish out my patches?

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Goody

The beauty of a solution lies in its simplicity

Its called.....wait for it......seam sealer!.....and is available at automotive supply stores.
Good luck with your project!

Now who would think a seam sealer would be called seam sealer? LOL! Thanks!

I'll start a posting when I get my fiero carcass back from the bead blaster. I already have lots of pictures to show.

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Goody

The beauty of a solution lies in its simplicity

FYI, it can be pretty pricey. Now, with that said, I have used a product like Liquid Nails when running a seam on a patch. I have also used Seam Sealer for some areas.

seam sealer can be bought in an auto paint shop in tubes like silicone. You just run a bead of it where you want to seal it, and it hardens overnite and is paintable. Its also called Drip Check Sealer (because it was also used on roofs where the drip rail was). Most cars now dont have a drip rail...so when you open a door in the rain, all the water will run in.