within a couple of hours of setting, but it is not 100% cured. The tile supply company told me it can take up to 30 day or more for the mortor to be fully cured. Depends on the temperature . The colder it is the longer it takes to cure. I used a rubber mallet and 2x4 after setting it to make sure it was level to the other tile.
Follow Ups
what kind of mortor did you use? I can walk on mine - AzHeat13:10:03 11/05/04