Etch is 37% phosphoric acid. Place a small amount on a sponge or cotton pellet and rub the surface of the enamel for 1½ to 2 minutes; wash and evacuate; air dry. Our etch is designed to prevent the material from flowing near the gingival area.
Luer-Lock Dispensing Tips are available in three sizes: 20 gauge, 22 gauge, and 25 gauge. The size gauge you use will determine the pressure needed to extrude the etch.