Nourish and strengthen your grey or blonde hair with Blond Absolu Masque Ultra-Violet by Kérastase, a purple hair mask. It works to neutralise brassy and yellow undertones, for a cool, bright blonde or silver colour. Think of it as skincare for your hair. With its rich, ultraviolet cream texture, this Hyaluronic Acid hair mask works deeply to reconstruct hair. It also contains Edelweiss Flowers Extract, and the two ingredients act together to nourish and restore the fibre of grey, white, silver or lightened hair.. . The power of neutralisation combined with an ultra-caring mask.. Neutralises brassy and yellow undertones for a flawless-looking blonde.. Deeply restores and nourishes the fibre.. Radiant shine and improved softness.. Illuminates cool blonde hair for an even brightness.. +91% hydrated hair* . . *Instrumental test after application of Masque Ultra-Violet.rich purple hair mask to neutralise brassiness.