The 3M Scotch-Weld Multi-Material Composite Urethane Adhesives are two-part, green, non-sag urethane paste designed for structural bonding of composites, plastics, metals, and wood. With a 30-minute open time and excellent elongation properties, these adhesives are ideal for medium-to-large assemblies where flexible, durable bonds are essential. Their primerless adhesion to most substrates, combined with high resistance to water, humidity, and chemicals, makes them an excellent alternative to mechanical fasteners in demanding, multi-material applications. Features and Benefits Two-component urethane for strong, flexible structural bonds Non-sag formula stays in place on vertical or contoured surfaces 30-minute open time allows easy positioning of parts Bonds composites, plastics, metals, and wood without primer Excellent resistance to water, humidity, and chemicals Room-temperature cure, accelerable with heat Can replace rivets or screws for fatigue-resistant, clean assemblies