3M Marine Adhesive Sealant Fast Cure 5200 (05220) Permanent Bonding and Sealing for Boats and RVs Above and Below the Waterline Waterproof Repair, White, 3 fl oz Tube

We used it to glue the rubber feet back onto a metal pool ladder. It cures underwater without issue. It's still holding after a couple weeks.

There is nothing else that comes close. My records show I have purchased it 3 times from Amazon. Slow curing so you have plenty of time to position the part and then use something to hold it in place for 24 hours. Generally considered permanant - you will have to cut the glue seam to remove the part so don't use it on something that might need to be removed years down the road. Strong - you bet. I glued some flat pieces of metal to tubing on my boat. I can stand on these parts with all my weight. Pay attention to the directions - no alcohol cleaning prior to gluing. Can be frozen for longer life span. And NEVER wear good clothes while using this. Nothing will take it out of your clothes if you make a mistake. Use painters tape around the glue area to keep the 5200 off the surrounding area. Keep lots of paper towels near by - it is messy and seems to go everywhere by itself. Uses moisture to cure so can get wet before cured. And finally - guessing here - may be hazzardous to use in a fish tank. Lots of odd chemicals in this stuff.

ok

Muy bueno

great glue

As advertised, better than local vendors price

Product worked as intended.

I used this to attach a stainless steel vent to a resin deck box. I made sure the area of application was clean, put a generous amount of sealant around the brim, and shimmed it in place to make sure it would cure in the correct position. 24 hours later and the vent is stuck fast where I put it. I will definitely be using this stuff again.