CB-4 Bio Chain rite is a 100% biodegradable, natural, plant-based degreaser. It removes the toughest grease and grime build up from chains and bicycle components. Bio Chain rite is also an excellent general purpose bicycle degreaser. Regular use of Citrus Chain rite; and the CM-5 and regular use of a quality chain lubricant will reduce gear system wear and friction and promote smoother, quicker shifting. A handy flip-top lid on the bottle makes spill free pouring easy.