Whomever had my boat before me has sealed up the gap on the back of the pylons with silicone. Is this really necessary? The corner castings are not watertight around the pylons so sealing up this gap seems counterproductive. Water would get in but not be able to drain out or evaporate. Also there was sealant caulk around the pylons to the hull. It was kind of nasty looking so I scraped it off and was going to reseal but it looked pointless to me. The pylons are hard cast into the fiberglass and there is no gap whatsoever. I'm thinking that if the pylons are separating from the hulls....the boat ought to be scrapped.