Refresh your hair and scalp while you sleep with the Revolution Beauty Haircare Salicylic Acid Clarifying Scalp Serum for Oily Dandruff. The overnight hair treatment is designed to nourish the skin and help rebalance excess scalp oil. Enriched with salicylic acid, the scalp serum gently lifts away build-up while tea tree oil helps to soothe and comfort. To improve your haircare routine, the leave-in hair serum helps to replenish with hydration while promoting a healthy-looking, revitalised shine. Vegan, cruelty-free, sulphate-free and silicone-free.