Build-It FR Blue shade Mini-Mix Refill: 4 - 4 mL Syringes Shade A3. Fiber Reinforced Core Material, Self-Cure or Light-Cure. Extra syringes for Build-It FR. Non-slumping, high viscosity formula. Self-curing, accelerate with curing light. Great radiopacity. Build-It FR is a build-up resin composite material formulated for use in crown restorations and rebuilding tooth structures. Featuring a unique viscosity, Build-It FR is highly flowable yet stacks without slumping for easy application.It results in a solid fluoride-releasing foundation with outstanding X-ray visibility and compressive strength of 280 MPa, ideal for indirect restorations. Build-It FR takes a few minutes to self-cure, which can be accelerated with a curing light to create a compact structure in seconds.Available in multiple shades. Each kit contains 4 (4 ml) mini-mix syringes, 20 mixing tips, 20 intra-oral tips, and an instruction guide.