I gots the rot...
Well, shame on me for trusting my RV repair guy to do the inspecting of my roof seals... Found water in the rear toolbox compartment after some heavy rains last month, and then we noticed the bubbling...
Forum Discussion
If the only caulk that you are removing is the same as your first picture then it's not silicone. If you're not going to repair the wood then just peel the caulk back until you get to where it's stuck to the roof, Then lay a new bead down a little wider than the original and call it a day. I would just go right over the old bits that are still stuck as they aren't causing any problems.
