2 Epoxy 330 Water Clear Adhesive Lapidary Rock Gem Glue This is a new set of 4 tubes of Epoxy 330 Used to bond gem materials to metal 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