Can You Add Bike Tire Sealant Directly Into Valve Core?

Can You Add Bike Tire Sealant Directly Into Valve Core? Can You Put Sealant In Inner Tubes? You can put tire sealant in butyl (black) bike inner tubes to fix or prevent punctures. For best results you should use tube specific sealant. Presta valves with removable cores and all Schrader (car) valves allow easy access