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Tracked since 20 Oct 2026.
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Instantly fuller, thicker-looking hair with lightweight volume and heat protection.
Redken Acidic Grow Full System Instant Densifying Spray is a lightweight leave-in treatment designed for thin, fine and flat hair. It instantly boosts the appearance of density and fullness while helping protect hair against heat styling up to 230°C.
Formulated with Redken's 5% Densifying Complex, the spray uses densifying polymers to give fine hair an immediate fuller, thicker appearance without weighing it down.
Perfect for anyone struggling with flat, fine-looking hair or hair prone to breakage from brushing, it can be used on its own for instant density or as the final step in the complete Redken Acidic Grow Full System.
Why you'll love it:
Instantly creates fuller, thicker-looking hair
Adds density to thin, fine and flat hair
Lightweight formula won't weigh hair down
Provides heat protection up to 230°C
Formulated with 5% Densifying Complex
Ideal for hair prone to breakage from brushing
Suitable for colour-treated hair
Leave-in formula – no rinsing required
Can be used alone or as part of the complete Acidic Grow Full System
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