Wood adhesives are specialized bonding agents formulated to join wood and wood-based materials with high strength and durability. These adhesives are engineered to provide excellent adhesion, water resistance, and flexibility to accommodate the natural expansion and contraction of wood under varying environmental conditions. Common types include urea-formaldehyde, phenol-formaldehyde, melamine-formaldehyde, and polyurethane adhesives, each selected based on application requirements such as indoor or outdoor use, curing time, and mechanical performance.