Dental GC 1 Glass Ionomer Cement Dental Luting & Lining Cement Yellow Radiopaque Big Pack. Excellent adhesion to both tooth and metal. Biocompatibility and a tooth-like coefficient of thermal expansion reduces the risk of post-operative sensitivity. Good mixing properties results in a smooth creamy mix with good flow. Film thickness of just 15 microns makes complete seating of crowns easy. Extended working time with sharp set. Long term fluoride release.