black floor sealer?

[KevinW]

my 69 Camaro floor needed minor patching.  Now I want to replace the sealer.  The factory used this big globs of black coal tar looking stuff on top of the primer.  I would like to keep it looking somewhat factory.  What was/is that stuff? 

I will put the modern sealer down first, prime and then put the goop on top for looks.  Thoughts?

[L78 steve]

I couldn't find the coal tar at any auto supplier .But I used (from back in my boating days) A coal tar epoxy made by Interlux for steel or aluminum hulls . Its a nasty 2 part that is perfect for the job. Its just a bit glossier when it sets-up.