Steve, Thanks for the reply/advice!
I will get some of the Loctite PL marine sealant at Home Depot.
It make sense to repair the existing caulking at the rear of poptop, even though it
seems to look pretty intact.
A few years ago I had water leakage in the front area near the frig.
The flooring was spongy there as well.
I resealed the 2 front poptop caulking locations and it seemed to resolve the leak.
Thanks,
Andrew