Apex Resin is use for all crown & bridge applications as well as implant or precision attachment cases. Resin additives eliminate brittleness and add external hardness. The exclusive Apex flow agent allows for stackability, while free material flow during vibration. 18,500 psi (128 MPa) Compressive Strength. 19:100 W/P Ratio. 10-13 Min Set Time. RZ-10 (0.10% Expansion).