ryan
i saw some white glue made by the same company that makes mighty bond, pioneer? maybe. although I would try an epoxy again. I use a boatbuilding epoxy that is used for laminating glass fabric. it is thin but there are techniques to make it work. some formulations have additives to make them rubbery or useful for some things but not others. Hard to tell, but if there are specialty additives in what you tried, it will never be as strong as straight resin.
I find better results if I mix very well, and then mix again, especially if I am mixing a small amount compared to the size of the mixing container. not fully cured is another reason it can seem rubbery also. I mix by weight not volume to get the proportions correct, as that too can make it rubbery. I dont much like rubbery epoxy if your glue line is properly thin, good epoxy is flexible enough.
Heck, I probably have some in the fridge.
this is primitive archery, so fish glue might be the way to go if you are building a primitive bow
, If you want to play around with fish skins/bladders, find something like a small electric double boiler that you can keep at about 180F or lower (this is probably an outside/shop only project, as it gets smelly and takes time) If you want to experiment with something like this, post as you go along. I think you will get some interest and comments here.
You know guys. You don't need to boil your hides or sinew down for glue. Just put a roast or chicken in the oven with some water and after awhile pour off the water. You will have some glue and diner at the same time.
and there is always knox, which I believe is more of a bone glue. some guys mix the fish and the hide
http://www.primitivearcher.com/smf/index.php/topic,2803.0.html