Thus, a fiber optic epoxy is a two-part structural adhesive that bonds the fiber glass silica to the zirconia ceramic ferrule. It has low outgassing levels, a high glass transition temperature (Tg) and shrinks minimally upon curing. In high-speed fiber optic networks, ceramic ferrules play a pivotal role in aligning and protecting optical fibers. It is important to understand exactly what Tg is and how it could. Using the proper adhesive in the assembly of fiber optic components not only saves time and expense, but also can improve reliability and performance. Adhesives for fiber optic components that perform well on glass, metal, ceramic and most plastic substrates provide excellent chemical and solvent. Adhesives play a pivotal role in the assembly of fiber optic components due to their high performance on glass, metal, ceramic and most plastic substrates, excellent chemical and solvent resistance, and electrically insulating properties. The adhesive must meet an exacting set of criteria to ensure the optical signal remains unimpeded: Optical Clarity and Transmission: The adhesive must be perfectly clear and highly transparent across the. re radiused ceramic ferrules, manufactured by Co ning Optical Communications. This installation requires the TKT-025 tool kit.