S.R.B. is a powerful, concentrated spot cleaner which dislodges and removes common stains caused by moss, mildew, leaf, rust, blood, beverage spills and non-greasy food. S.R.B.’s concentrated, biodegradable formula allows for a full spectrum of dilutions matched to your cleaning needs. S.R.B.’s unique Clean Rinse Technology quickly and easily rinses away residue with a high or low pressure washer. Ideal for concrete and clay pavers, concrete flat work and retaining walls. Can also be used on manufactured and natural stone, concrete block, wet cast products. Works on both horizontal and vertical applications. Not for use on asphalt.