Anyone with natural gray or silver hair, or light blonde hair, whose colour picks up a yellow or brassy cast from sun, heat, hard water or pollution. It is aimed at keeping silver looking bright and cool rather than dull.

It also suits people whose gray hair feels coarse or wiry, because the formula conditions as it tones. It works best alongside the matching Graydiant Shampoo. The 1000 ml size is practical for salons or regular users.

Gray and silver hair shows yellowing more than any other shade, and many purple products tone but leave the hair dry. Graydiant is built for gray hair specifically: it pairs silver and violet pigments with amino acids that address the coarse, wiry feel gray strands often have. Used a few times a week, it keeps silver bright between visits without a separate toning treatment.

1. Shampoo with Color Extend Graydiant Shampoo.
2. Wearing suitable gloves, apply the conditioner to damp hair.
3. Leave on for 3 to 5 minutes.
4. Rinse thoroughly.

Rinse immediately if it gets in your eyes. Start at the shorter time on very light or porous hair and increase if you want more toning.

The main advantage is that one step both tones and conditions: pigments cancel yellow in gray and silver hair while the conditioner smooths texture. Redken reports 2x stronger hair when it is used with the matching shampoo.

Things to keep in mind: the pigments can stain hands and light surfaces, so gloves are needed, and leaving it on too long on very light or porous hair can leave a violet tinge. It is designed for gray, silver and light blonde hair; it won't do much on darker shades. Redken has discontinued this product, so replacement stock may be limited.