A pre-shampoo treatment that seals the cuticle + balances hair's PH to protect color from wash-related fading. fadeblock pre-shampoo color seal also helps to:+ shield against hard water+ shield against saltwater+ shield against chlorine+ contains UV filters. Apply to dry hair prior to shampooing from roots to ends. Leave in 1-2 minutes. Rinse. Follow wash routine as usual. Fadeblock* keeps hair color protected on 10-12 washes. *when used with the Vault shampoo, conditioner and leave-in conditioner Using Fadeblock* for 10 washes helps to lock color. *when used with the Vault shampoo, conditioner and leave-in conditioner 10-12 washes using Fadeblock* will keep your color vibrant and fresh. *when used with the Vault shampoo, conditioner and leave-in conditioner150ml Amika Fadeblock Pre-Shampoo Color Seal 150 ml