Hi,
I recommend the hollister 7730 medical adhesive it's about $25 on amazon. If you want to take off the prosthetics they also have a remover that works really well or you can use acetone/nail polish remover but it is much slower to remove. Also be very careful not to remove the prosthetic too fast because you can remove your skin. This stuff holds for up to three days provided you clean your skin with rubbing alcohol first. It holds a few pounds pretty well too.