3M™ Scotch-Weld™ Urethane Adhesive 3532 is a brown, non-sag, two-component polyurethane adhesive. This urethane adhesive has a 10 minute work life for spreading or repositioning. Ideal for bonding dissimilar substrates, such as composites, SMC, FRP, many plastics, ceramic, wood, rubber and metal. - Two part urethane delivers extremely tough, semi-flexible bonds. Designed for vertical and other applications that require no slumping or sagging of the adhesive bead. Low-temperature flexibility. Flexible adhesive that is capable of bonding dissimilar substrates.