Vericom ET136-K000 DenFil Etchant Etching Gel Syringe Value Kit 12/Pk 3 mL por | Jul 20, 202637% Phosphoric Acid Etch, Semi-Gel Type. Fast effect and easy removal. Expiration Date. The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies.