3M™ Scotch-Weld™ Instant Adhesive Activator is a one-part surface accelerator designed for use with instant adhesives. This adhesive accelerator helps improve the cure speed of instant adhesives, quickly producing long-lasting bonds and exceptional performance.A one-part surface accelerator, 3M Scotch-Weld Instant Adhesive Activator is designed to accelerate the cure speed of instant adhesives to deliver fast, strong results. This general-purpose instant adhesive accelerator produces long-lasting bonds and exceptional performance. This adhesive accelerator is engineered to minimize the degradation of sensitive plastics. Instant adhesives are cyanoacrylate-based formulas that act as strong, fast-acting glues used in industrial and household applications. In general, they are an acrylic resin that rapidly polymerizes in the presence of moisture, forming long, strong chains to join the bonded surfaces together. Cyanoacrylate adhesives should be applied thinly, with pressure put on the bond for a few seconds, to ensure that the reaction proceeds rapidly and a strong bond forms within a reasonable time.