Libral Traders Pvt. Ltd offers Polymeric Acid based Semi Gel for Dental Etching. Libral Traders Pvt. Ltd supplies a wide range of accessories and equipments used in the field of Dental & Surgical specially Orthodontics. The Polymeric Acid based Semi Gel for Dental Etching available under the brand name "DenFil Etchant 37" is a Phosphoric acid [H3PO4] formulation thickened with natural polymeric materials. The Polymeric Acid based Semi Gel is designed for easy etching work where required.