3M Scotch-Weld urethane adhesive 3549 is a brown, non-sag, two-component polyurethane adhesive. This urethane adhesive has a 60 minute work life for panel bonding or repositioning. Ideal for bonding dissimilar substrates, such as composites, SMC, FRP, many plastics, ceramic, wood, rubber and metal. - Polyurethane adhesive that forms tough structural bonds. Provides high peel strength for long-term durability. Formulated to be impact resistant, creating a tough and durable bond. Designed to be a sag-resistant urethane adhesive for accurate application. Longer work-life offers time for proper application and adjustment.