 Maybe there's just a little bit of spalling or some damage that happened on the surface of some concrete and you want to flatten that out a little bit. This works pretty good. It's different than the hydraulic patching. Make sure you don't use hydraulic patch for anything that's not contained on all the different sides. Vinyl concrete patch does not expand as it cures. So it can be freestanding. It doesn't have to be formed or supported or retained in any way.