Comments about Evercoat Evercoat Marine Epoxy Glue Syringe:

As a wildlife student, I used this product to attach tiny plastic tags (3x5 mm) to aquatic snails. Yes, aquatic snails. It worked great and I never lost a single tag. The snails would continue growing more shell on top of the tags and the tags would never move. I would also cover the tags with the glue and could still easily read the tiny numbers through it.

You have to make sure that you have a clean and dry surface on which to mix the adhesive. And it can drip on unwanted places if you're not careful (it will ruin your clothes, trust me), but it sets much faster than other products I tried. And it comes with a little plastic stick for mixing the two substances together... very handy!