Wood glue contains two chemicals: water and an adhesive that dries to a sticky film. Most people use wood glue for projects like picture frames, construction, and even furniture making. But the adhesive doesn’t hold up to all surfaces. Some wood materials, such as glass or metal, don’t naturally accept wood glue. If you try to attach something to a surface that doesn’t hold glue. You may need to use stronger, waterproof glue.
Wood glue can also be messy, so it’s good to clean up any mess before moving to the next step.