The best first aid for snakebite is a set of car keys and a fast trip to the hospital. I've survived a rattlesnake bite and I can assure you its not in the least bit something you want to experience. I'm a good sport when I find a rattler. I kill the bugger and roast it, and no, its not like chicken.
Super Glue and Krazy Glue contain some toxins. n-butyl cyanoacrylate and 2-octyl cyanoacrylate are compounded for first aid, medical, and veterinary use.
Vietnam was where I first saw glue used to close wounds. Odd thing is that it came out of the development of plastic rifle sights.