Clearing up:
1. Copydex DOES NOT operate like RC in any shape or form. Totally different, in fact
2. The Duck/Henkel brand is the 'creme de la creme' for RC, for things like gluing split cards (esp. the Non-Wrinkle version) and also some well-known magic effects
3. RC, aka CONTACT ADHESIVE is spirit based. In the States, it's called RC... in the UK, it's Contact adhesive. There are different grades for different jobs, but generally the CRAFT versions are the versions which you'll find best as a magician.
4. Copydex actually IS in fact made of old fish. It's pulped dead fish. That's why it smells so bad. Joking aside, the first glue patent was given in 1750 for an adhesive made from fish! True!
5. Out of all the glue factories in all the towns, Dobbin unfortunately made his way to this one.
6. On that note, did you know that Muffin the Mule is an offence in several southern US states?
7. Did you hear about the unsuccessful glue sniffer who tried to get stoned safely using a Pritt stick?
8. How come when you mix water and flour together you get glue
... and then you add eggs and sugar and you get cake? Where does the glue go?
9. Did you know that there's a WHOLE website outlining what glue is best for your needs?
http://www.thistothat.com
10. The first forms of glues were made from plant resins, and throughout history, glues have derived from natural sources such as animal hide, ground bones and fats. Only recently have synthetic glues become commonplace!
Here's a cool way to carry RC around until you need it...
Ask a woman for an empty nail varnish bottle. Wash it out with nail polish remover, and fill it with RC. You get a brush and bottle—which won't get dissolved by the RC.
Another cool method for quick and disposable applications is a small piece of sponge soaked in RC. Natural sponge seems best.
Now, this can be kept in a sealed polybag!