SDR Posterior Bulk Fill Flowable Base is a one-component, fluoride-containing, visible light cured, radiopaque resin composite restorative material. It is designed to be used as a base in class I and II restorations. SDR™ material has handling characteristics typical of a “flowable” composite, but can be placed in 4 mm increments with minimal polymerization stress. SDR™ material has a self-leveling feature that allows intimate adaptation to the prepared cavity walls. Available in one universal shade, it is designed to be overlayed with a methacrylate based universal/posterior composite for replacing missing occlusal/facial enamel.