Acid Etch 37% is clear on both tissues enamel and dentine. Enamel rods are totally demineralized while inter-prismatic zones are less affected. An excellent surface configuration for bonding infiltration and gripping to enamel tissue. Dentine microscopic view shows open tubules with a total absence of smear layer. 37% Phosphoric Acid. Made in Lebanon. **For further product information, please contact Chat Support**