Gradia core has a one-step, self-etching bonding system and easy mixing system, which results in a homogeneous mix of the two paste components. The components have an optimal consistency, long working time and rapid dual-cure. One product can be used for cementing the post and building up the core. Excellent physical properties combine with ease of use for a product that will meet all of your core building needs. Its benefits are, easy mixing and handling,easy-to-read radiographs,more than three minutes of working time Prevents voids in the bonded post and core, has cutting characteristics that are similar to dentin.