Epoxy 330, water-clear glue, line bonds with fast setting time. Used to bond gem materials to metal finding and takes a high polish for inlay. It can also be used for invisible bonding of glass, china, ceramics, stone, metals and other non-porous materials. Thickens in 15 minutes and hardens in 2 hours. Hardens in 10 minutes under a heat lamp. Two- 1/2oz tubes.