Apply iBond Etch to the whole cavity surface, starting at the bevelled enamel area and then the dentine. Also ensure that the enamel is etched for a minimum of 20 seconds and a maximum of 30 seconds, and that the dentine is conditioned for a minimum of 15 seconds and a maximum of 20 seconds.
Spray iBond Etch thoroughly with water spray for 20 seconds. No residue must remain in the cavity.
Dry the cavity with oil free air (do not dry out the dentine!). The etched enamel surface should appear chalky white.