I'm sure our vegan friends can manage their gluing needs without violating their morals as @WBahn suggested in his post. I would be embarrassed if my industry was not able to provide a petrochemical solution to bonding, candles or detergents.https://en.wikipedia.org/wiki/Animal_glue
https://en.wikipedia.org/wiki/Hoof_glue
and maybe "Gorilla Glue".
As for Gorilla Glue, you got me. I wonder how many great apes thy get in each bottle.