Are you wanting to glue a glass bow?
I don't think I would chance it, you will end up with week spots and bubbles in your tube and uneven pressure on your lams.
This will result in bad glue lines with glue thicker in spots than other. The bow will fail.
If you can't get fire hose do a search on forms and you'll find some that use bike inner tubes for clamping pressure. I think that would be fine for a mild D/R or hill style bow.
Also you could go to your local fire house and see if they have any old non leaking fire hose. ( it leaks on purpose to cool hose in a fire)
Good luck
Cory