Bio ChainBrite Bicycle Chain and Component Cleaning Fluid is a 100% biodegradable, natural, plant-based degreaser formulated for use in the CM-5.2 Cyclone Chain Scrubber or as a general purpose degreaser. Won't harm alloy, plastic, or rubber parts. Use CB-4 full strength, do not dilute with water. Cover parts in solvent and scrub using a brush. 16 oz. bottle.