I do stained glass patterns and use the glue on them. After the pattern is glued on the glass I cut the glass the pattern is glued on and then the final grinding is done. Then the pattern is soaked off with water and the glue stick allow this with no problem. Good product don't screw with it....
Only one glue stick came that wouldn't twist up to be used but all of the rest were fantastic! My 4-year-old Kindergartners found the glue sticks very easy to use.