A revised ASTM International standard covers gelled acid, patented by Surface Gel Tek, for the first time. The standard was revised to acknowledge that hydrochloric acid is now available in both liquid and gelled form. ASTM International Committee D33 has approved the revision to standard D4260, which has been retitled “Practice for Liquid and Gelled Acid Etching of Concrete.” The use of gelled acid is addressed in Method B of the new standard. It was not mentioned in previous versions. ASTM standards are available at www.astm.org or by calling (610) 832- 9585. For more information on gelled acid, contact
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