Reactive type adhesives represent the foundation of structural bonding, an industry that has had a tremendous growth in the past 20 years. These adhesives continue to have the greatest number of advantages toward optimum bonding, including good initial wetting and environmental resistance. The extent of their use in the automotive industry has been somewhat limited, especially when compared to their tremendous growth and acceptance in the building of today's aircraft. Their use in the building of tomorrow's automobile represents an excellent opportunity to the automotive designer when he must exploit every advantage offered by the best adhesives. Reactive type adhesives can be successfully used in low-volume production, military vehicles, replacement parts, and similar applications.