Puzzle glue for framing finished jigsaws: Hasi Jigsaw Puzzle Glue
Hasi Jigsaw Puzzle Glue is a water-based PVA adhesive for preserving completed puzzles at home. After applying it to the front of a neglected 150-piece sunflower puzzle and drying it for 2 hours, the pieces held firmly and fit easily into a frame. Verdict: a satisfying, odor-free way to preserve a puzzle.