Enhance and preserve your completed puzzle masterpiece with RGS Puzzle Glue. Spread the clear adhesive over the face of the puzzle to bond the Pieces together. To further stabilize your puzzle apply to the back as well. For Glow-in-the-Dark and 3-D puzzles apply glue to back side of puzzle only. Once glue has dried, you can mount your puzzle in a frame and display your work of art. What's in the box 1 x glue (148ml)