Instantbond® 121 is a very high viscosity, state-of-the-art, single component, solventless, room temperature curing cyanoacrylate adhesive that polymerizes rapidly when pressed into a thin film between parts. The presence of surface moisture commences the cure of the adhesive. Instantbond® 121 develops handling strength within seconds and full functional strength in a few hours. Instantbond® 121 can bond a wide variety of surfaces including metals, thermoplastics, elastomers, ceramics, leather, cork, and paper. Notwithstanding the superior bonding capability of Instantbond® 121, it is NOT recommended for long-term glass to glass bonding applications.