Optical grade epoxies, silicones, and UV curable compounds provide solutions to engineers for bonding, sealing, coating, and encapsulating in fiber optic and optoelectronic applications, as well as in other demanding areas such as medical, military, and aerospace systems. Optical adhesives are supporting advances in optical assemblies, collections of optical components and mechanical parts that precisely manipulate light for focusing, imaging, and beam shaping. Unlike conventional adhesives, optical adhesives possess unique properties that are crucial for maintaining optical performance.