Which glue is commonly used for aircraft wood repairs?

Resorcinol glue is widely recognized as the appropriate adhesive for aircraft wood repairs due to its excellent strength and durability when bonding wood components. This type of glue is known for its water-resistant properties and ability to withstand environmental stresses, making it suitable for the demanding conditions that aircraft are subjected to during operation. In aviation, the integrity of wood structures is vital for safety and performance, and resorcinol provides a structural bond that can endure vibration, temperature fluctuations, and moisture exposure.

Other adhesives may not offer the same level of performance or resistance. For instance, casein glue is an organic protein-based adhesive that is less commonly used in modern aviation applications due to its susceptibility to moisture and a generally weaker bond under stress. Polyurethane glue, although versatile and strong, is not typically specified for aircraft wood repairs since it can expand during curing, which may not be ideal for precision requirements in aviation. Hot melt adhesives, while effective for some applications, do not provide the long-lasting, water-resistant bond needed for aircraft wood structures.