Blu-Gel is a 37% phosphoric acid blue etching gel from Laboratorios Clarben, thixotropic and odorless, that etches enamel and dentin in 15 to 20 seconds and rinses off without residue.

Octacid Green is a 37% phosphoric acid green etching gel from Laboratorios Clarben, with thixotropic viscosity for precise application and easy visual control of the etched area.