l'oreal professional paris hair touch up root concealer spray, auburn, 2.0 ounce l'oreal paris are gray roots distracting from your new auburn hair color, but you have no plans to hit the salon just yet? l'oreal professionnel hair touch up professional root concealer in auburn, one of 7 available shades, is the quick, easy and natural-looking solution to covering up gray hairs until your next hair appointment. just spray it onto roots to blend away the silver. the results will last 1 shampoo.