Titebond Polyurethane Glue is a professional-strength, waterproof glue specially formulated for multi-purpose applications. In addition to its superior wood-to-wood performance, it is equally effective for metal, ceramic, plastic, stone and other porous or non-porous materials. Titebond Polyurethane Glue is ready to use, offers excellent sandability and is unaffected by paint, varnishes and other finishes. It is twice as thick as traditional polyurethanes and provides a non-running, non-drip glue line for more precise applications. Titebond Polyurethane Glue does not become brittle with age and will not expand or contract in the glue joint.