When it comes to glueing plastics, I allways use a glue ment for neoprene diversuits..
This is a incredible glue, strong as you like it to be.
The brand I use is called " Aquasure", and you find it is most angler shops. But if you find a glue for such suits, yep, thats the one.
The difference between this glue, and epoxy types, is that this one is really sticking to the material, and won`t let go, ever..
Epoxy can only stick as long as the area isn`t torn any way, or disturbed.
This glue is very flexible and strong.....
The same one as in all my dragchutes, wich requires quite amount of glueing.

The best part is, it sticks to anything, exept butter...

Gudmund