I typically stay away from caustic ingredient products, but Durasole is one of the fastest and most proven ways to help build sole and fight thrush. I don't like to use to too frequently, and my usually routine is to use it day one, then nothing day two, then a red horse product like field paste on day 3 (for treating thrush). For building sole I like to use Durasole first, then give the foot a break for two days then follow up with hoof armor. A must have in any equestrians tool box.