Redken Acidic Bonding Concentrate Leave-In Conditioner — Bond-Building & 450°F Heat Protection

Redken Acidic Bonding Concentrate Leave-In Conditioner is a lightweight, leave-on treatment that rebuilds weakened hair bonds, reduces split ends, and shields strands from heat and color fade.

This professional-grade leave-in formula uses citric acid and Redken’s Bonding Care Complex to reinforce fragile fibers, restore smoothness, and preserve salon color. Designed for use on damp, clean hair, it layers easily under styling products and provides thermal protection up to 450°F. The product is vegan and sulfate-free, developed to work as part of the Acidic Bonding system alongside the shampoo and conditioner for best results.

How does this leave-in repair damaged hair?

The treatment targets weakened links along the hair shaft with a citric-acid pH approach and a bonding complex that fortifies the inner structure. By leaving the formula in place, it continuously conditions and supports strand integrity between washes, helping to reduce visible breakage over time.

• Citric acid helps rebalance hair surface pH for smoother cuticles.
• Bonding Care Complex reinforces internal fiber connections.
• Leave-in design delivers ongoing conditioning to mid-lengths and ends.
• Formulated to pair with Acidic Bonding Shampoo and Conditioner for cumulative effects.

Will this protect my color and styling tools?

Yes — the formula includes ingredients that help lock in salon color while also offering heat protection for thermal styling. It creates a lightweight barrier that reduces color fading and helps shield hair from high temperatures used with blow dryers, straighteners, or curling irons.

• Helps preserve color vibrancy and reduce washout.
• Heat protection rated up to 450°F for thermal styling safety.
• Non-greasy finish so color and shine remain natural-looking.

How should I use the Acidic Bonding Concentrate Leave-In?

Apply to clean, towel-dried hair focusing on mid-lengths and ends; do not rinse out. Use daily as needed or before heat styling for protection and strength-building benefits. For best outcomes, incorporate it into the full Acidic Bonding routine.

• Work through damp hair after shampoo and conditioner.
• Leave in—no rinsing required; style as usual.
• Use with matching Redken Acidic Bonding products for optimized results.

What results can I expect and how quickly?

Regular use visibly improves manageability and reduces the appearance of split ends and breakage, with cumulative strengthening over several uses. Immediate benefits include smoother texture and heat protection; structural repair becomes more noticeable with consistent application over weeks.

• Instant: smoother, more manageable hair and heat shield.
• Short term: reduced frizz and fewer visible split ends.
• Ongoing: reinforced bond strength and improved resilience with repeated use.

Who is this for: This leave-in conditioner is formulated for people with weak, brittle, chemically or heat-damaged hair who want a salon-quality repair step they can apply at home. It suits all hair types, including color-treated hair, and is ideal for anyone seeking a lightweight, vegan, sulfate-free treatment that combines conditioning, bond repair, and thermal/color protection in one product.

Ingredients

AQUA / WATER / EAU DIMETHICONE CETEARYL ALCOHOL AMODIMETHICONE PHENOXYETHANOL POLYQUATERNIUM-37 DIMETHICONOL PARFUM / FRAGRANCE PROPYLENE GLYCOL DICAPRYLATE/DICAPRATE TRIDECETH-5 STEARETH-20 CETYL HYDROXYETHYLCELLULOSE GLYCERIN CITRIC ACID LIMONENE PPG-1 TRIDECETH-6 TRIDECETH-10 SODIUM HYDROXIDE CHLORHEXIDINE DIGLUCONATE SORBITAN OLEATE ACETIC ACID LINALOOL CITRONELLOL CITRAL EUGENOL