Nomad Willy
Guru
Epoxy and all the other super glues won't allow movement. This is a flexable joint and flexible sealers must be used.
There are basically two kinds. Those that adhere and those that don't. What one uses depends on how much movement there will be. If small enough movement then adhering sealer will do. Perhaps a sealer-adhesive. But in this case metal fasteners are holding the parts together so adhesion is not needed. Whatever you put in there just needs to keep the water out. Dolphinite would be fine but probably would ooze out on a hot day or even a warm day and there would be "ooze" everywhere.
I'd find something like Dolphinite that is much like peanut butter and fill the joint w it. Then put something over the outside seam that will always be dry to touch. The two seam fillers must be compatible w each other.
This should be kinda like caulking a hull plank seam. Put something on the inside of the seam (like oakum) to keep the water out of the hull and something on the outside to keep the oakum in and isolate the oakum so it won't fall out, get torn out or come in contact w other boats (rubber duckies) fenders or even human hands.
My joints on the cap rail are close enough that there is little movement. So I use an adhesive sealant ... Sika-Flex 291.
There are basically two kinds. Those that adhere and those that don't. What one uses depends on how much movement there will be. If small enough movement then adhering sealer will do. Perhaps a sealer-adhesive. But in this case metal fasteners are holding the parts together so adhesion is not needed. Whatever you put in there just needs to keep the water out. Dolphinite would be fine but probably would ooze out on a hot day or even a warm day and there would be "ooze" everywhere.
I'd find something like Dolphinite that is much like peanut butter and fill the joint w it. Then put something over the outside seam that will always be dry to touch. The two seam fillers must be compatible w each other.
This should be kinda like caulking a hull plank seam. Put something on the inside of the seam (like oakum) to keep the water out of the hull and something on the outside to keep the oakum in and isolate the oakum so it won't fall out, get torn out or come in contact w other boats (rubber duckies) fenders or even human hands.
My joints on the cap rail are close enough that there is little movement. So I use an adhesive sealant ... Sika-Flex 291.
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