35% phosphoric acid etch specifically designed to provide an optimum level of viscosity. Self-limiting in its depth of etch (average depth of 1.9 microns with 20 second etch). Viscous enough to prevent migration caused by gravity and also maintain a thick enough layer to prevent premature drying. Contains no glycerine and designed for rapid and complete removal upon rinsing. Suitable for etching before bonding composites, sealants or bonding adhesives. Blue in colour.