Redken Acidic Bonding Concentrate 24/7 Night & Day Serum — 1.6 fl oz lightweight repair & anti-frizz leave-in

Redken Acidic Bonding Concentrate 24/7 Night & Day Serum is a lightweight leave-in treatment designed to repair weakened hair bonds, reduce frizz, and protect strands both overnight and during the day.

This concentrated serum is formulated for processed, color-treated, and damaged hair that needs continuous reinforcement. Using a blend of citric acid, polyglutamic acid, and squalane, the formula penetrates the hair fiber to strengthen internal bonds and lay down a protective outer layer. It’s lightweight enough for daily use on damp or dry hair, and it provides humidity resistance to help smooth cuticles and limit breakage while preserving color and manageability.

How quickly will I see smoother, stronger hair?

Visible smoothing and improved manageability can appear after the first application, with cumulative benefits over repeated use. The serum works immediately on the surface for frizz control and continues to rebuild internal connections in subsequent applications.

• Noticeably smoother hair after one use, increasing with regular application.
• Formula targets multiple layers inside the strand for progressive strengthening.
• Light texture avoids weighing hair down while delivering protection.

How do the active ingredients repair and protect hair?

Citric acid helps the treatment penetrate deeper into the hair fiber, while polyglutamic acid supports long-lasting bond reinforcement. Squalane adds hydration and a shielding layer to reduce friction, split ends, and moisture loss.

• Citric acid enhances absorption to reach inner layers of the strand.
• Polyglutamic acid promotes tensile strength and resilience.
• Squalane supplies lightweight conditioning and surface protection.

Can I use this serum on color-treated or heat-styled hair?

Yes—this treatment is formulated to be safe for color-treated hair and to help defend against heat and environmental stressors. It reduces breakage risk and extends the look of salon color when used consistently.

• Helps shield hair from styling tools and daily environmental exposure.
• Supports color retention by smoothing the cuticle and reducing friction.
• Suitable for daily use on damp or dry hair before styling.

How should I apply the serum for best results?

Apply a small amount to mid-lengths and ends—on clean, damp or dry hair—then style as usual. For overnight repair, apply generously and let the serum work while you sleep; use daily for continuous reinforcement.

• Dispense a pea-to-quarter-size amount depending on hair length and thickness.
• Distribute evenly from mid-lengths to ends, avoiding the roots if oily.
• Can be used morning or night, and before heat styling for added protection.

Who is this for? This serum is ideal for people with chemically treated, bleached, or otherwise damaged hair who want an easy, leave-in solution for strengthening and smoothing. It’s well suited to those seeking lightweight daily protection against humidity, heat, and everyday wear, and for anyone aiming to reduce split ends and breakage without heavy oils or buildup.

Ingredients

AQUA / WATER / EAU • ISOPROPYL MYRISTATE • DIMETHICONE • TRIETHANOLAMINE • AMODIMETHICONE • PHENOXYETHANOL • SQUALANE • PARFUM / FRAGRANCE • CARBOMER • POLYQUATERNIUM-4 • POTATO STARCH MODIFIED • HYDROXYPROPYL GUAR • CITRIC ACID • BEHENTRIMONIUM CHLORIDE • SODIUM POLYGLUTAMATE • COCO-BETAINE • TRIDECETH-6 • ISOPROPYL ALCOHOL • SODIUM CHLORIDE • CETRIMONIUM CHLORIDE • LIMONENE • LINALOOL • GERANIOL • CITRONELLOL • COUMARIN • ALPHA-ISOMETHYL IONONE