There's a tar like substance sealing all the welds in the interior of my 68 impala. Should I wait till I por-15 the interior before I reseal the welds (it all flaked off) or should I reseal them first? Also, what shold I seal it with? Silicone?
That substance is called "seam sealer" and no you should NOT seal them before the por 15. Exstensivly clean all that goop off and aplly the por-15 over the seam as well as the rest of the floor, it will seal it. Use two layers over the seam to be sure.