Clifton one-part or two-part adhesive for urethane works great! Be sure to read the instructions: the stuff needs to be used in a specific way, but once that job is done, it's PERMANENT!
You definitely do NOT want to use Aquaseal: it won't cure without air exposure. There's a new information about this kind of thing on the website under "tips & techniques: repairs and enhancements."
All posts are personal opinions only.
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