Quaternary ammonium fluoride reagent TBAF in PMA is effective in removing cured silicone adhesives from electronic components. For manufacturers, engineers, and professionals working with sensitive optical components, understanding the proper techniques for. Epoxy is a permanent adhesive. At times though, you may find that you need to recover bonded parts or clean parts to remove excess cured epoxy. They often raise reflectance and can visually (under a microscope) appear as a rainbow sheen or fog. Residues from buffer coating. Optically Clear Adhesive (OCA) is a solid-state adhesive used in the manufacture of touch panels and LCD screens. Successful adhesive removal relies on selecting a method that targets the glue's chemical structure or physical properties without compromising the surface integrity.