Built for people with color-treated hair - whether from a salon color service or at-home color - who want to boost shine and help colour look fresher between color appointments or touch-ups. Because it's a rinse-out treatment applied and washed out within about 5-10 minutes, it suits anyone comfortable with a normal shower routine; it does not require professional mixing or salon-only handling, and Redken markets it directly for at-home use. It is not intended as an everyday leave-in conditioner or an overnight mask - it's a periodic (roughly weekly) shine-and-condition step layered on top of a normal shampoo/conditioner routine.

The real differentiator is the acidic pH mechanism: rather than just coating hair with conditioning agents, the formula is pre-activated with citric acid specifically to counteract the more alkaline state hair is often left in after a color service, which is what allows it to help flatten the cuticle and boost reflectivity rather than just adding temporary slip. Paired with apricot kernel oil for conditioning and a brief 5-10 minute contact time, it's designed as a quick, repeatable shine-and-color-care step rather than a heavy, occasional deep-treatment mask.

• Use about once weekly, after shampooing
• Apply to towel-dried (damp), color-treated hair from mid-lengths to ends, avoiding the scalp/roots
• Leave on for 5-10 minutes
• Rinse thoroughly
• Follow with a regular conditioner or leave-in styling product as usual; wearing gloves during application is recommended since the formula is acidic

• Pros:
• Short 5-10 minute contact time fits into a normal wash-day routine rather than requiring an overnight commitment
• Acidic formula is specifically designed to work with color-treated hair's chemistry (color services typically leave hair more alkaline) rather than being a generic conditioning treatment repurposed for color
• Backed by Redken's own testing showing a measurable shine increase when used with its matching shampoo
• Cons:
• Best (tested) results are tied to using it alongside the matching Acidic Color Gloss shampoo, so results may be less pronounced used in isolation with an unrelated shampoo
• Contains a small amount of hydrogen peroxide, so anyone with a peroxide sensitivity or very compromised/damaged hair should introduce it cautiously
• Not suited to anyone looking for a leave-in or overnight deep-conditioning mask - it must be rinsed out on the stated timeline