Dr. Walter Brenner, Master Bond, Inc. An overview of the key
characteristics of optical epoxies, including where each type
can be used and how to choose among them Technology in the
optics industry has steadily advanced over the past several
years, which can make the process of selecting an adhesive very
complex, considering the number of factors now involved. Epoxies
frequently are used for bonding, sealing, coating and
encapsulating applications across optical, optoelectronic,
medical and related industries. Given the vast range of
properties that epoxy materials offer, perhaps an efficient and
effective way to choose a formulation is to explore some of the
more significant properties of these systems before and after
curing. Before curing, these range from color and viscosity to
working life and mix ratios. After curing, optical properties,
chemical and temperature resistance, and flexibility are among
the features of paramount importance in selecting an optical
adhesive. Optical properties such as light t