Specific for puzzles, this is the best glue to mount a finished puzzle. puzzle pieces will stick to cardboard or whatever surface it might be glued to. The quick-drying formula allows users to add more product every few inches to help the glued puzzle stay put.
Apply puzzle glue to front and back of puzzle, allow to dry and add a second coat if necessary.
For best results use a plastic putty scraper that you can find at any hardware store or dollar store