Epoxy 330 This two-part xpoxy 330 water-clear glue line bonds with fast setting time. Used to bond gem materials to metal jewelry findings 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 1/2 fl. oz tubes.