This mask is for people with blonde, lightened, or highlighted hair who notice their color turning yellow, orange, or brassy between salon visits — whether from natural pigment showing through, hard water, sun exposure, or gradual color fade.

It's a consumer at-home product that works into a normal wash routine, with no professional mixing or application required. It's designed as a periodic conditioning-mask step rather than a daily product — Redken suggests using it in place of a regular conditioner about once a week, or more often if brassiness returns quickly.

The main advantage of this mask over a standard purple shampoo is processing time and pigment concentration — it's built to deliver a visible correction in 5 to 10 minutes rather than requiring pigment to build up over repeated washes, which matters for blonde hair that brasses quickly between salon appointments.

Because it's positioned as a weekly conditioning step rather than a daily toner, it suits people who want to manage brassiness without switching their everyday shampoo and conditioner.

For best results, use it in place of a conditioner after shampooing with Redken Color Extend Blondage Shampoo.

• Shampoo, then towel-dry hair
• Wearing gloves, apply the mask through mid-lengths and ends, avoiding the scalp
• Comb through for even distribution
• Leave on 5 minutes for subtle toning, or up to 10 minutes for maximum brass correction
• Rinse thoroughly
• Use about once a week, or more often as needed to maintain a cool blonde tone

• Pro: Purple pigments are concentrated enough to visibly correct brassiness in a single 5-10 minute application
• Pro: Formulated without added sulfates, parabens, or phthalates
• Pro: Doubles as a conditioning treatment, so it replaces rather than adds an extra step to a wash routine
• Con: Contains fragrance and the allergen coumarin plus linalool, which can be irritating for sensitive scalps
• Con: Very light or previously over-toned blonde hair can pick up too much violet pigment if left on the full 10 minutes, risking a lavender cast
• Con: Only tones existing blonde/lightened hair — it doesn't lighten hair or replace a colorist's toning service