Etching Bisco

37% Phosphoric Acid Etchant with Benzalkonium ChlorideEtch-37 w/BAC is a 32% phosphoric acid semi-gel etchant with Benzalkonium Chloride (BAC) that is effective at quickly etching enamel and dentin. Etch-37 w/BAC is blue in color for easy visualization and contrast, creates micro retentive surface characteristics that are necessary for successful bonding, and rinses away cleanly and quickly leaving no residue to interfere with bonding. Etch-37 w/BAC utilizes a polymer to create thixotropic properties, thus enhancing handling characteristics.