Filtek Bulk Fill Flowable Restorative Refill Shade Universal Syringes, 2 - 2g Syringes. Filtek Bulk Fill Flowable Restorative offers a single-step placement with a 4 mm curing depth and minimal shrinkage stress. Due to its flowable viscosity, the microhybrid material offers an impressive adaptation to the surrounding tooth structure. The zirconia and silica components produce a superior bond as the dental material polymerizes via light-curing into a durable restoration with maximum wear resistance. Filtek Bulk Fill Flowable Restorative is best utilized in Class III and V restorative procedures and as a liner for Class I and II.