|1:1 Ratio temporary crown and bridge material. C&B Prompt‰ã¢ is a self-curing, resin based composition designed for easy fabrication of temporary crowns and bridges. It sets in two stages, providing for easy working. Curing is complete in four minutes with initial setting in 90 seconds. For making repairs, C&B Prompt‰ã¢ is compatible with self and light-cured resin based materials. Available in 3 lifelike natural-looking shades: A1/B1, A2 and A3. Each package contains 1 cartridge of 76 gm. material and 15 blue mixing tips.