I am in the process of a restoration. Most of my fittings on the deck leak. What kind of caulking do I use to repair the leak? I read 5200 is the best then I read dont use in some areas, use 4200, then I hear Silicone is a no no, but a boat MFG owner told me he uses silicone on all his boats. I dropped the mast to replace the wiring a few week ago so I removed the chainplates and cleaned/caulked with 5200, still leaks but not as bad. So I am kind of lost. I need to seal out the water even under load/stress of sailing so it must flex, but we all know that. So any ideas on the best solution? I think "Good old boat" March/April 2009 issue has a good idea on the chainplates which I will try.