I was so excited to try this from vocalpoint.com  So, I mix it, apply it, and leave it on 15 mins. I left on 15 mins, because it was the extra light blonde. 10 mins probably would have been long enough. But it still came out blonde and amazing. I am so impressed with this product. I always wanted to try it, instead of dying my whole head with hair color. I highly recommend Root Touch-Up by Nice n Easy!