You can also find jigsaw puzzle glue online. If you want to make your own glue, just mix one-part water with one-part white glue. Shake the mixture and you have puzzle glue![3] X Research source If you pick the 8 ounce (236 milliliter) bottle, you should be able to glue between 8 and 12 puzzles, depending on the size.
Although you may be tempted to use newspaper for this purpose, it is strongly discouraged. It will likely get stuck to your puzzle in the gluing process.
You could ask a friend to hold the puzzle while you pull the parchment paper underneath.
Avoid adding too much glue at once, since it can lead to swelling. [8] X Research source
At this stage, you may see some air bubbles. This is fine, since they will go away when the glue dries.
You may want a second set of hands to properly center the puzzle on the foam core. Spray the adhesive glue in a well ventilated area. The puzzle needs to be glued together prior to mounting.
