Gorilla Glue is a favorite adhesive among DIYers ... The firm hold sets in as a chemical reaction from the polyurethane's contact with a damp surface. During the glue's curing process, it expands ...

As the polymers dry, the liquid evaporates and the solid, sticky adhesive stays behind. Other glues help things stick because of a chemical reaction. Silicone and cyanoacrylate glues, like Krazy Glue ...