BOND Wash Solution 10X Concentrate 1 L AR9590 P Components BOND Wash Solution 10X Concentrate is a concentrated buffer solution specifically for use on the automated BOND system. It is available in 1 L quantities, and when diluted will make up 10 L of working solution. Background BOND Wash Solution is the only wash buffer that should be used in BOND automated staining procedures. It is formulated for smooth and gentle reagent flow under the BOND Covertile to help ensure that excess reagent is removed from the tissue section before new reagent is added.