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 ...

Elmer's glue has water in it plus a much longer, more flexible chemical compound called polyvinyl acetate. These long flexible molecules are moving around in the water like intertwined strands of ...