Park Tool CB-4 Bio Chainbrite Chain and Component Cleaner
Bio ChainBrite™ Bicycle Chain and Component Cleaning Fluid is a 100% biodegradable, natural, plant-based degreaser formulated as a general purpose degreaser. It won't harm alloy, plastic, or rubber parts. Use CB-4 full strength, do not dilute with water. Perfect for use with chain scrubber/cleaner tools, or simply cover parts with Bio Chainbrite and scrub using a brush and wipe down with a rag.
Made in the USA..
The co-owners were hands-on bicycle repair folk back in the 1950s when bikes were simpler. Starting in the 1960s, bikes started getting more complex and the need for purpose-specific bike tools arose and Howard and Art met that need. Now more than 50 years into its journey, Park Tools is still developing and producing some of the finest bicycle tools in existence.