Ravensburger 17954 Puzzle Glue Puzzle Glue Conservator The liquid glue is applied directly from the bottle through an opening in the sponge to the surface of the puzzle and is evenly distributed with it. After 1 hour, the preservative will have dried veil-free. 200 ml bottle of puzzle preservative for 8 puzzles with 500 pieces, for 4 puzzles with 1000 pieces, etc. The Ravensburger Puzzle