just use the gel by its self , if your using plugs drop a healthy amount on and stand the frag in it , if you pour a few drops of water over it it will cure faster
use eggcrate to hold your plug while it dries out of water, sprinkle water on it every few mins to keep it from drying out
i only use glue for eveything i find epoxy does nothing that glue by its self wont do