After a heavy rain or a good hose down the deck and hull seam leaks down the cabin wall a brown streaky water ( stained from the interior wood band covering the seam). It's gotten so bad I went to put something in the storage unit below the port setee (directly under the leak) and it was full of water! If I want to repair with some type of caulking is the seam more accessible at the boat interior (under the teak band) or on the exterior of the boat. Any suggestions on a proper sealant? Thanks for any advice you may have!