Schwarzkopf Brilliance 25 Timeless Blonde provides irresistible colour intensity for up to 10 weeks, with up to 100% grey coverage. Schwarzkopf Brilliance provides irresistible colour intensity for up to 10 weeks, with up to 100% grey coverage. The Diamond Gloss Sealer postcolour treatment contains keratin and apricot kernel oil for healthylooking and stronger hair, which is available in a tube for easy application and multiple uses. Up to 10 weeks Colour Intensity Brilliant shine Perfect grey c Blonde Hair Colour, Dyed Blonde Hair, Black Henna, Stronger Hair, Gray Coverage, Apricot Kernels, Hydrogen Peroxide, Color Your Hair, Apricot Kernel Oil