Amika Fadeblock Pre-Shampoo Colour Seal When you want colour-treated styles to stay vibrant as long as humanly possible, get some help with this Amika Fadeblock Pre-Shampoo Colour Seal ($25). It seals hair's cuticles and balances your pH level, both prevent fading over time and also despite any saltwater or chlorine exposure. Image Source: sephora.com Amika Fadeblock Pre-Shampoo Colour Seal $25 from sephora.com Buy Now