The targeted root creme works in just 10 minutes and matches leading shades --even salon color just 10 minutes to say goodbye to roots and grays 100 percent gray coverage permanent color that blends seamlessly available in blonde, brunette, black and red shades precision brush for quick and easy application lasts up to 3 weeks extend the life of your hair color. Root touch-up gives your hair color a boost, covering roots and grays anytime between regular colorings. The targeted root creme works in just 10 minutes and matches leading shades --even salon color, among leading retail permanent shades and pre-formulated salon color.