BOND DAB Enhancer 30 mL AR9432 P Components BOND DAB Enhancer is a heavy metal solution for use on the automated BOND system. The no-mix, ready-to-use format simplifies laboratory workflow. Background BOND DAB Enhancer changes the color of the DAB reaction deposit from golden to dark brown, providing an increase in contrast between chromogen-specific staining and the slide back drop. This can assist in qualitative identification of antigens. Staining without DAB Enhancer. Human tonsil stained for CD20 with NCL-CD20-MJ1 using BOND Polymer Refine Detection. Staining with DAB Enhancer. Human tonsil stained for CD20 with NCL-CD20-MJ1 using BOND Polymer Refine Detection.