- Ultradent LC Block-Out Resin provides reservoir space for bleaching trays. - It’s 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.