Anthracite colored ceralun ceramic epoxy composite by Swarovski. This high-performance, two-component epoxy clay is very versatile and was developed especially for use with Swarovski crystals. It adheres to metal, glass, crystal, plastic, rubber, wood, cork and porcelain. This crystal clay is easy to mix, shape and mold with a mixing ratio of 1:1 for both components. Plus, it's a perfect complement to light chrome effect crystals! Unused ceralun epoxy clay will last up to a year when stored at room temperature. It hardens within 72 hours at room temperature. Working time is a maximum of 3 hours.