Have used Grax for 10 months and love it. We try to avoid riding in the rain but have been caught in light rain many times on long road rides and this has held up without any issues. We always clean the chain well prior to using Grax. Most of my daily rides are 30-65 miles so usually I put at least 300 miles on it before cleaning the chain and a new Grax application. Super quiet the entire time. Really makes shifting on my 9 speed cassette quiet. My bike is a 2014 Roubaix, last of the 9 speed road bikes but I will die with it! :)