What does the SILCA Ultimate Sealant Injector do?

The SILCA Ultimate Sealant Injector is a 2oz precision syringe that adds or tops up tubeless sealant through the valve stem without breaking the tire bead. Remove the valve core, thread the injector onto the open valve, dispense the amount you need, then reinstall the core. The measured barrel markings let you put in a precise volume rather than guessing from a bottle, which keeps installs clean and your sealant levels consistent across wheels.

One compatibility note matters: this injector is designed for the standard injectable SILCA Ultimate Tubeless Sealant. It is not for SILCA's FiberFoam sealant, whose carbon fiber strands are too large to pass through a syringe and which uses the separate SILCA Tubeless Replenisher Injector instead. It fits standard Presta valves and requires a valve core tool, the core tool built into the cap of SILCA Ultimate Tubeless Valves works well for this.