Filtek™ One Bulk Fill Restorative is the strongest bulk fill composite we have tested at Dental Advisor. It has an excellent radiopacity of 310% equivalence to aluminum. Filtek™ One Bulk Fill Restorative was tested with two different Depth of Cure methods and successfully cured 4 mm under different test methods and with 3 different curing lights. Filtek™ One Bulk Fill Restorative recorded the highest flexural strength at 183 MPa of any direct composite tested in our lab and a high compressive strength of 347 MPa.