redken's acidic color gloss activated glass gloss treatment is an at-home professional strength glossing treatment that deeply conditions and adds intense, molecular-level shine for color-treated hair. a ph-balanced formula with citric acid and apricot oil, this pre-activated ultra-acidic formula helps seal the cuticle and locks in glass-like shine for up to 3 days and +76% shinier hair**. this rinse out glossing treatment leaves hair looking and feeling revitalized. use as a complete routine with acidic color gloss shampoo, conditioner and heat protection leave-in treatment.