I use the Loon UV setup. Uses are limitless.
Makes a great wing cover for nymphs (copper johns, stones, etc.), with flash tinsel underneath it creates a sort of prism effect.
Smooths out small worms and midge larvae, while adding translucence.
Heads for baitfish.
Gooey looking mysis patterns.
smoother chironomid bodies.
The best part is that you can 'sculpt' the material because it is very viscous, setting it in place with the light when the right shape is achieved.
On these flies, I used UV glue to fill in the head around the bead eyes, and to smooth the wing case. A coat of 'hard as hull' gives grain and durability to the fly.
Glue heads created over stick-on eyes for bait fish:
Absorbed in to feathers to make 'claws', also for giving shape to the thin-skin back. A drop is set at the end of a rubber leg to make 'eyes'.
I also patched a hole in my waders with the stuff, still working!
I balked at first, didn't want to spend ~30-50$ on a UV setup. Now I use it almost every time I tie. You won't regret the money spent in my opinion.