Replying to Best product for holding in broken edges??

That time of year when the rails are getting the best of the sticks and edges starting to crack..

What have u guys found works best? I've experimented a lot with JB welds and other glues but none seem to last more than a day or 2 of riding without cracking and falling out from the flex. Any suggestions for something strong and waterproof yet a little forgiving? OG gorilla glue has been the best bet so far