There are a number of clear adhesives that are suitable for bonding glass to plastic and that remain clear and colorless. Dymax 429 or 4-20418 are candidates that cure with UV light in seconds to form a strong bond between multiple substrates. Epotek 353ND is a clear two-part epoxy that would also work well. These few options might get you started looking in the right direction.

A key criterion for selecting the right material for your application is to identify how many parts you will make per day, per month, and per year and what type of process you can envision. Is high-speed UV curing the best option, or should you perhaps consider using the benefits of light-curing materials, which cure “on-demand”? Such adhesives allow you to align the parts, and once they are aligned, you shine light on them for a few seconds, locking them in place. Or are you more comfortable using a two-part material that needs to be mixed and degassed prior to use to avoid air bubbles? Some epoxies are available in 1:1 mix-ratio cartridges, allowing you to dispense through a static mixer system and easing the formation of air bubbles. Dymax ER1196/CT1196 is an 8000 cP two-component epoxy available in a 1:1 mix.

Another factor in selecting the right material is to determine what viscosity will work best for your part or application. To put this in perspective, water = 1 cP, honey = 10,000 cP, Dymax 429 = 2,500 cP, and Dymax 4-20418 = 450 cP.