What is a common feature of polyurethane glue compared to other types?

Polyurethane glue is distinct from many other adhesive types because it requires moisture to cure effectively. This characteristic is crucial to its bonding process; when moisture is present, the glue reacts chemically to form strong, durable bonds that are often more resilient than those created by other adhesives. This moisture activation allows polyurethane glue to perform well in various conditions, making it suitable for a wide range of applications in cabinetry, millwork, and finish carpentry.

Other adhesives may not depend on moisture or may have different curing mechanisms. For instance, some types of glues might dry through a solvent evaporation process or by thermoplastic means. The moisture requirement of polyurethane glue also means it can be applied to slightly damp surfaces, which can be beneficial during construction and woodworking tasks.

While certain other choices mention appealing features of adhesives, such as being clear or flexible, those are not defining characteristics of polyurethane glue compared to the necessity for moisture to initiate its curing process.