Metal DX MASK Metal DX Mask closes hair structure and stops new metal particles from deposits on hair , ensuring a beautiful finish . Glicoamine is a small molecules small enough to penetrate hair , finding copper residue and neutralizing it . Visible results after just one use . Your hair structure is improved and the color payoff is more reliable and brighter . How to use METAL DX MASK After shampooing , spread Metal Detox Mask all over towel - dried hair . Leave on for 8 to 10 minutes , then rinse thoroughly . For best results , use shampoo and mask from this hair care line together . Loreal prodak original