OptiBond eXTRa Universal is a radiopaque, two-component, self-etch, light-cured (10s) universal bonding agent (primer + adhesive). Suitable for use with all resin-based dental materials, including compomers and all light-, self- and dual-cured composites, composite cements and core build-up materials. Surfaces to be treated are: dentin, enamel, hypersensitive root surfaces , ceramics, porcelain, metals, root canal posts, indirect restorations. Dual Cure Activator is not required, replaces silane. Refrigerator storage. Always shake the adhesive for 5s before use. Package includes: OptiBond eXTRa Universal — 5ml Bottle Refill — Primer.