Seal Drip Rail Gutters on 30 Coupe

[Bruce_MO]

You could try "Seaming Compound". It's the stuff used to seal panels that have been spot-welded together (seams in trunks, etc.). You can prime and paint it just fine. I have some in a quart can that I bought long ago from an automotive paint supplier. I think you can also get it in a tube for a caulking gun. I think that Eastwood also has it.