What is gum glue? I've only used piping gel or egg white. The gel actually does dry though it can take awhile and in more humid or HOT environments will melt but once a piece is adhered to it's fondant backing it's not going to slip anywhere. Experiment with it. I actually find that for adhering purposes Wilton's piping gel is better than the smoother cake decorating store gel. Wilton's is thicker and holds better. There's my two cents!!
8/2/11 at 10:48am