3M's Scotch-Weld instant adhesive CA4 is a low viscosity instant adhesive. The CA4 instant adhesive is formulated to give exceptional strength and impact resistance on a wide variety of substrates, including plastics and rubbers. Once applied, the glue has fast handling time and cures to keep jobs moving quickly. Pinch for a precise drop or squeeze for a steady bead to bond to many substrates, including plastics and rubbers. CA4 features high strength and impact resistance and reaches handling strength in under 40 seconds. It is a low viscosity adhesive that is easily applied from the bottle to create a strong, durable, and long-lasting bond on a variety of substrates.

Instant adhesives are cyanoacrylate based formulas that are strong, fast-acting glues used in industrial, automotive, and household applications. In general, they are an acrylic resin that rapidly polymerizes in the presence of moisture, forming long, strong chains, joining 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 is formed within a reasonable time.

3M instant adhesives apply directly from the container and rapidly reach handling strength at room temperature. Commonly referred to as super glue, a single drop per square inch can bond many plastics, rubbers, metals, wood and more.