What is the shelf life characteristic of hide glue once opened?

Hide glue, once opened, has a short shelf life primarily due to its organic nature. Unlike synthetic adhesives, which may contain preservatives that extend their usability, hide glue is made from animal collagen, which can degrade over time. Once open, factors such as exposure to moisture and air can further affect its performance, leading to a decrease in effectiveness for bonding.

As a result, contractors and woodworkers must take care to use it relatively soon after opening, or they might find that it no longer adheres properly, which is crucial for projects requiring strong joints in cabinetry and millwork. Proper storage in a cool, dry place can help extend its usability, but it still should be replaced more frequently than other types of adhesives with longer shelf lives.