A mysterious thick, green chain grease has appeared on Shimano sponsored pro bikes when the weather turns for the worse. There has been much speculation as to what this greaselube is. Team mechanics typically say it's just something Shimano gives them for rainy racing. Shimano was silent about it, as usual.
And then this appeared, the holy grail of keeping a chain running smoothly for long rides in the worst weather.
This is serious stuff. Much MUCH thicker than any other chain lube available. This is the kind of stuff cranky old European mechanics use diesel fuel to clean off after each ride.