We tried a sample bottle of Chain L at work over a course of a month or two of wet commuting. We all seemed to notice it wearing off quickly with the first application, however we were all trying to get our chains cleaned beforehand, so that may have played a part. The "smooth" feeling is amazing compared the the T9 we all normally use. I applied to my fixed commuter, the rest to geared bikes. Whether the wet roads were a contributor or not, I noticed alot more derailleur pulley butter (that caked on encapsulated grit and grime) with the Chain L.