Why is a urethane glue preferred for certain applications?

Urethane glue is preferred for certain applications primarily because it has gap-filling properties. This characteristic allows the adhesive to effectively bond materials that may not fit perfectly together, such as irregular surfaces or joints with small gaps. When applied, urethane glue expands as it cures, which helps it to occupy any voids between the materials being bonded. This expansion not only enhances the bond strength but also ensures that the adhesive forms a solid connection, even when the surfaces do not have perfect alignment.

Additionally, while it is true that urethane glue creates a strong bond and exhibits some useful properties such as flexibility and durability, the ability to fill gaps is a standout feature that can be particularly advantageous in woodworking and cabinetry where precision joints cannot always be guaranteed. This makes urethane glue a popular choice for applications that require both adhesion strength and versatility in accommodating various surface conditions.