Redken Acidic Grow Full Instant Densifying Spray is a leave-in volumizing spray for thin, flat hair that lifts the roots and makes hair look and feel thicker straight after styling. It is the styling step of the Acidic Grow Full System, built on Azelaic Acid+ with caffeine and probiotics in a pH-balanced formula carrying a 5% densifying complex.
It goes on clean, damp hair before blow-drying, so it slots into the routine after washing without a rinse. The finish is light and non-greasy, the 6.8 oz (200 ml) bottle has a trigger sprayer for even coverage, and it protects against heat styling up to 230°C (450°F). Redken lists it as safe for colour-treated hair.
- Instant root lift and fuller, thicker-looking hair
- Heat protection up to 230°C / 450°F
- Lightweight, non-greasy finish that leaves hair soft
- 2x stronger hair and 2x less breakage when the full shampoo, conditioner, serum and spray system is used, versus a non-conditioning shampoo
In a Redken consumer test of the full system, 91% saw hair lifted at the roots. It is a cosmetic styling product that changes how hair looks and feels; it does not treat hair loss.