I cleaned out the drip rail to good an I need to replace all the filler that was there,what was an what is used to fill in the valley of the drip rail on my 65 coupe?
I would use this stuff, its runny. It uses an Automix applicator gun. But its a two-component product and lasts long. Mask off or dam up the ends of the drip rail so you can control how much stays and how much runs off. Just one opinion!