Extreme Lubes polymer formula penetrates deep into the chains links, to reduce wear and friction to a minimum in even the harshest of conditions. Non-drying hydrophobic lubricant film sticks to every link even during a long, rain soaked ride! Rest assured that Muc-Off Bio Drivetrain Cleaner will remove it quickly when the time does come for a clean and re-application!; Suitable for standard, O, X and Z-Ring chains For harsh weather on/off-road riding For High performance riding in the most extreme conditions Contains UV over spray dye