Wonder 10 cc Syringe This Instant Soldering and Firing Support is used to support crowns, jackets, and veneers on a firing peg during the kiln process. It requires no mixing or pre-drying time and there is zero firing distortion. It also works well when soldering structures and as a heat shield. For temperatures 400°C to 1300°C. Convenient 10cc syringe provides easy application.