Seal in your colour with Color Service Express Color Treatment, designed to prevent oxidation after colouring and optimise pH in just 30 seconds for your best hair colour results. Designed for use after hair colouring or lightening for a salon-quality finish. Formulated with Metal Purifier to protect hair from harmful metals present in water, without silicones. Apply to damp hair. Leave on for 30 seconds and rinse thoroughly. For best results, use alongside Color Service Skin Protection Cream and Stain Remover for the most clean, precise hair colouring experience.