[quote=jalex]I can’t comment on your specific issue as I’m unfamiliar with the 21.
I epoxied the crossbars on my 16 because I had some excessive play between bars and castings. I just used thickend West System and after a full year of sailing it seems to still be a tenacious bond. I obviously reriveted but I wouldn’t be surprised if it would have held up with epoxy alone.
West System has some newer application specific stuff called G/Flex that may be better suited for aluminum.[/quote]
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