Puzzle Glue. This non-toxic, washable glue is perfect for protecting and preserving that finished puzzle. It features a built-in brush for applying even layers of glue and dries clear so your finished product will look great for years to come! Allow glue to dry at least 1 hour before applying subsequent coats. This package contains 4 fl. oz. of puzzle glue. Conforms to ASTM D 4236. Made in USA.