Compatible with all provisional materials. It will not soften, craze, or discolor acrylic or polycarbonate crowns. Zone Temporary Dental Cement is kind to the pulp and tissue and will not decalcify dentin. Zone Temporary Dental Cement has a 30-second mixing time and a 2-minute working time. This hard setting, crystalline cement assures consistent, superior retention, yet permits easy removal and clean up.