Howdy,
When I used to work at Chrysler Jeep/Truck we’d have these soft patches that would go on the sheetmetal joints before paint, and then cure up hard in the paint ovens. I have a leak at the top of my D-Pillar, and the patch that covers the Roof/Quarter/Roof Bow joint looks like it cured badly. It’s all broken up like a desert mud hole in summertime. I figure that’s the most likely point for water intrusion.

Can anyone recommend a repair material, aside from bathroom caulk? I never knew the name of the material we used at Chrysler, nor where I’d find it or how i’d Get it to cure.

Here’s how it’s supposed to look (courtesy of the other side of my Cherokee)