Preserve your completed masterpieces for all eternity with the Ravensburger Puzzle Conserver Glue. This permanent puzzle conserver is enough for approximately four 1000 piece puzzles, and is sponge-tipped for ease of application. The Ravensburger Puzzle Conserver Glue is ready to use right out of the bottle, with no messy mixing or hassle. Just open, apply and wait one hour, and your puzzle will be ready for framing! Best of all, clean up is a snap too -- just remove the appliator tip and wash it out under running top water, and it'll be ready to go the next time you need it!