Hide glue is a traditional adhesive made from animal collagen, typically derived from the skins and bones of animals like cows or rabbits. It is commonly used in woodworking and furniture making due to its strong bond and ability to be easily reversed with heat and moisture, making it ideal for repairs. This glue comes in granule or sheet form and is usually mixed with water before application. Once dried, hide glue creates a durable bond that can withstand stress, but it is also flexible enough to allow for movement in wooden joints, making it a favorite among craftsmen and restorers.