Fuji II LC Improved Refills B4 Light-cured glass ionomer cement. Designed primarily as a restorative material for use in Class III, V and deciduous teeth, but is multi-purpose, with secondary indications as liner, base and core build-up. Smaller particles - excellent aesthetics and polishability, Higher filler loading - significantly improved abrasion resistance, Radiopaque, Self-adhesive to tooth structure - no etching, no bonding, Hydrophilic.