1967 Camaro Convert Windshield Piller Trim Sealer

[red67]

I have an original 1967 Camaro convertible that I have the windshield out of to replace and clean up the pinchweld. I believe the windshield was never out before I did it. I found a little surface rust in the top corners so I took the header chrome and the pillar trim off to repair. Nothing major on the body repair front but I would like some advice on what type of sealer to use under the stainless pillar trim. The header chrome uses what appears to be the same sealer. The existing sealer is still soft after 50 years and really almost looks new. A few photos of the trim with sealer are attached.