What Tayammum Makes Permissible

After performing Tayammum a person is pure and may do any of the acts requiring ritual purification, such as prayer.


What Nullifies Tayammum

Everything that nullifies an ablution nullifies Tayammum. If a person prays after performing Tayammum and then finds water, he does not need to repeat his prayer even if there is time left to do so.  However, once there is no longer a valid excuse for Tayammum, the person must make Wudu before offering the next prayer.