Muc-Off High Performance Biodegradable Chain Cleaner has been specifically formulated to quickly and safely remove heavy chain grime using advanced solvents. Its unique formula breaks down oil and grease to leave the entire chain sparkling clean and contaminant free. Don’t forget that if you’re looking for optimum results, you can always use our Chain Doc cleaning device for hassle free chain maintenance. Directions for use: Step 1 - Thoroughly rinse drive chain area before application. Step 2 - Apply Bio Chain Cleaner to drive chain area. Agitate grime with a brush or sponge. Step 3 - Rinse entire drive chain area with fresh, clean water.