3M™ EC-3549 B/A NF Scotch-Weld™ Urethane Adhesive 48.5mlProd Code: CWA3549485 Product Info 3M Scotch Weld Urethane Adhesive EC 3549 B A NF is a two part, non sag urethane adhesive. It provides tough, flexible bonds with good adhesion to a wide variety of substrates, especially wood and many properly abraded and cleaned plastics. Good adhesion can also be obtained on painted metals and ceramics and glass. For maximum bond durability under moist conditions, priming of glass is required.