THE BENEFITS
Redken Acidic Grow Full System provides the fullness of +5,000 hair fibers.* The instant densifying leave-in spray is a lightweight leave-in treatment formulated with 5% Densifying Complex that delivers instant fullness while protecting hair from heat styling up to 450°F.
BEST FOR:
- Thin, flat hair
- Hair prone to hair fall and breakage from brushing
- Suitable for all Color-Treated Hair
KEY BENEFITS
- Instantly fuller, thicker looking hair*
- 91% of GLP-1 users agreed hair feels thicker**
- 2X stronger hair***
- 2X less breakage****
- Clinically-tested to hydrate the scalp*****
| Feature | Detail |
|---|---|
| Active Ingredient | 5% Densifying Complex |
| Heat Protection | Up to 450°F |
| Application Type | Leave-in spray |
| Target Hair Type | Thin, flat hair; prone to breakage |
| Color Safety | Safe for all color-treated hair |
FAQ
How does the 5% Densifying Complex work to improve hair fullness?
The 5% Densifying Complex works by creating a lightweight film on the hair shaft that enhances the appearance of fullness without weighing hair down. It helps to fill in gaps between strands, giving the impression of thicker, fuller hair.
Can this spray be used on curly or wavy hair?
Yes, it is suitable for all hair types including curly and wavy hair. However, it is best suited for thin or flat hair where immediate fullness is desired.
Does the spray protect hair from heat tools?
Yes, the spray provides heat protection up to 450°F, making it safe to use before blow-drying, flat ironing, or other heat styling.

Virginia McLean –
I’ve been using this spray for a few weeks now and notice a significant improvement in the fullness of my hair. It doesn’t feel heavy and works well even on my thin strands. My hair feels stronger after each use and I’ve seen less breakage since starting it.
Hannah Baker –
The instant fullness effect is noticeable right after application. I apply it before styling and it makes my hair look thicker. It’s especially helpful when I’m brushing, as it reduces frizz and breakage.
Colin Churchill –
I have color-treated hair and was worried about damaging it. This spray is gentle and doesn’t affect the color. It gives a fuller look without adding volume, which is exactly what I needed.
Tracey Hamilton –
Works well with my daily routine. I use it after washing and before styling. My hair feels more resilient and I’ve noticed less split ends over time.
Alison Howard –
The 2X stronger hair claim is real. After using it regularly, my hair holds up better during brushing and heat styling. I also feel the scalp is more hydrated, which helps with overall hair health.