HN-5506AB Water Clear Non Yellowing Optical Epoxy for LED Display Module Lamination and Photo Coating HN-5506A/B is a two-component high-transparency epoxy crystal glue developed for optical and display applications. Its low viscosity, self-levelling flow and built-in defoaming give a water-clear, bubble-free surface that reproduces fine detail in display modules, digital tubes and photo coatings. After curing it forms a high-hardness, non-yellowing material with excellent