Historically, animal parts like hooves, bones, and hides were used in some types of glue. However, modern glues are primarily made from synthetic materials, like:
* Polyvinyl acetate (PVA): The most common type of glue found in households.
* Polyurethane: A strong and durable glue often used for woodworking.
* Epoxy resin: A two-part glue that creates a very strong bond.
While some traditional glue makers may still use animal-based products, these are less common today.