I have a 67 camaro, and on the firewall there's a seam that runs the
full length of the firewall. It use to have some kind of caulking,
tar, or something that was in it that was plainly visible and ran the
full lenght of the seam. I grinded it out to fix the firewall, but now
I want to put it back before I paint it. Does anyone know what it was
so I could buy some and replace it?