by Zig 2 Way Glue Pen: Broad. Blue when wet and clear when dry; use 2 different ways. For a permanent hold, apply glue to 1 paper surface and adhere it to another paper surface. For a repositionable hold, apply it to a paper surface and allow it to dry clear before adhering it to the other paper. Acid free and photo safe. water based glue; xylene free
