Ultra-Etch etchant 35% phosphoric acid solution features ideal viscosity, facilitates precise placement and superior control. It is selflimiting in its depth of etch (average depth of 1.9 μm with 15-second etch), creating an etch pattern that adhesives can penetrate for increased bond strength. Studies demonstrate Ultra-Etch etchant’s unique self-limiting chemistry on dentin creates an optimal surface to receive resin. Though Ultra-Etch etchant is viscous, it can penetrate into the smallest fissures or occlusal surfaces due to physical and chemical properties that promote capillary action. Its ideal viscosity maintains a layer that is thick enough to prevent premature drying. Ultra-Etch etchant is indicated for use on dentin and enamel to create optimal bonding surfaces. It can also be used to remove contaminants from composite on porcelain prior to bonding. Note: Do not use phosphoric etchant on metals or zirconia, as this will reduce bond strength. Contains 20pcs 1.2ml syringes and 40pcs blue micro tips.