Because people have a need to glue things to other things
Glass to CeramicFor the strongest, fastest, and most invisible bond we recommend:
Whenever you are gluing glass you must consider the visibility of the adhesive. If the glass is translucent or transparent, you will want a glue that dries as clear as possible.
Before gluing any glass bond be sure that the glass is clean, free of any oil (even from your fingers) and dry.