Mr. Q. In general, ALL deck, hull and house fittings should
be re-bedded eventually. What is necessary depends on how good the factory installation and bedding was, how much stress and strain a particular fitting is exposed to (stanchions, cleats, snaps etc.) and any signs of failed bedding (rust seeping from underneath fitting).
Personally, I would stay far away from 3M 5200 or silicone's. I've recently taken to using butyl tape for bedding and am quite pleased with the results thus far. As for caulk, I usually use 3M 4000 for most applications. For clear caulk I use Lexel. https://www.sashco.com/products/lexel/