Ultradent LC Block Out Resin Materials 4x 1.2ml Syringes (Bleaching Reservoir Space) #241Ultradent LC Block Out Resin provides reservoir space for bleaching trays. Its also useful for other laboratory procedures such as model and die repairs. Ultradent LC Block Out Resin can be rapidly and efficiently delivered with the Black Mini tip. It must be light cured and is not intended for intraoral use. Low viscosity for easy flow Blue pigment for easy visibility Great utility resin with numerous uses