G-S Hypo-Tube Jewelers Cement Clear 1/3 oz. Easy to apply with its built-in precision hypodermic-style tip, this crystal-clear jeweler's cement is an excellent choice for securing knots in bead-stringing, for setting glue-in mountings, and for attaching plastic or glass watch crystals. the applicator tip allows you to precisely place even the smallest amounts of adhesive exactly where it's needed. Crystal cement is long-lasting and won't become brittle over time.