3M™ Scotch-Weld™ Polyurethane Adhesive Applicator Accessories are designed to help maintain and add functionality to your 3M™ Scotch-Weld™ Polyurethane System. Choose from a variety of applicator tips, nozzle assemblies, and air valve kits to find the right accessories for your stringent project requirements.PURs (Polyurethane Reactive Adhesives) are a family of single-component, moisture-curing urethane adhesives. These adhesives are applied warm and can bond a wide variety of substrates such as wood, fibre-reinforced plastic and many other plastics to themselves, to metal, and to glass. With the hand-held 3M Scotch-Weld PUR Adhesive System, you have the practical benefits of two technologies in your assembly operation. This single-component system combines structural adhesive benefits and hot melt adhesive speed for wood, plastic, and more.