To prevent the caps from sticking on bottles of head cement etc. I have for years used CHAP STICK. Most folks will have this around the house and a mere thin film, wiped on a clean bottle rim will do the job.
However, don't mess with screw top caps on Crazy Glue. They have their own way of sealing with their cap design that works. The most common problem I've had with Crazy Glue is shelf life when purchased from shops with low turnover rates. The manufacturers never print any date code info on the bottles.