Long story, but i'd like to glue some nylon webbing. it doesn't need to hold weight, just hold to maintain form. any idea what kind of glue to use? all weather is needed..

I recommend bar tacking, even if you just sew it by hand. I haven't had much luck with glue when it's wet.

Are you trying to butt two ends together? Try melting both ends and butting them together. It works and is surprisingly sturdy. Practice on some scrap first and work quickly!