Redken Acidic Bonding Concentrate Shampoo 33.8 fl oz — Sulfate-Free, Bond-Strengthening for Damaged Color-Treated Hair

Redken Acidic Bonding Concentrate Shampoo is a concentrated, vegan, sulfate-free cleanser that helps reinforce weakened bonds, reduce breakage and protect color in damaged or processed hair.

This ultra-rich shampoo is Step 1 in Redken's highest-concentration bonding system, formulated with citric acid and Redken's Bonding Care Complex to target damage from coloring, heat and environmental stressors. The thick texture means a little goes a long way: begin with a quarter-size amount and add more based on hair length and porosity. It’s designed for salon-level repair at home while preserving color and delivering a fresh citrus-floral scent.

How does this shampoo strengthen fragile or chemically treated hair?

The formula uses citric acid to restore an acidic pH environment and Redken’s Bonding Care Complex to help shore up weakened internal links inside each strand. That combination works to improve tensile strength and reduce the appearance of damage without over-stripping moisture.

• Citric acid helps rebalance hair surface pH for smoother cuticles.
• Bonding Care Complex targets internal bond repair for stronger strands.
• Sulfate-free cleansing avoids unnecessary protein loss.
• Thick formula means concentrated application and less product waste.

Will it protect salon color and extend vibrancy?

This acidic shampoo is formulated to preserve color-treated hair by minimizing color fade while gently cleansing. It avoids harsh surfactants that can strip dye and includes conditioning agents that keep cuticles sealed to hold pigment longer.

• Acidic pH reduces cuticle lifting that leads to color washout.
• Sulfate-free surfactant system is gentler on dyed hair.
• Conditioning components maintain smoothness and shine for visible color longevity.

How should I use the 33.8 fl oz bottle for best results?

Because the shampoo is highly concentrated and thick, start with a quarter-size amount and lather, then increase if needed for longer or denser hair. For optimal repair, follow Redken’s Acidic Bonding Concentrate system steps and use the complete trio to maximize breakage reduction and split-end improvement.

• Begin with a small dose; emulsify between palms before applying to wet hair.
• Massage into roots and lengths, then rinse thoroughly.
• Pair with the corresponding conditioner and leave-in treatment for full system benefits.

What benefits can I expect after regular use?

When used as part of the full system, clinical-style testing shows meaningful improvements in breakage, split ends and smoothness, while routine use helps preserve color and improve manageability. Results depend on hair type and existing damage level, but many notice stronger, shinier hair with reduced tangles.

• Reduces breakage and visible split ends when combined with the system.
• Leaves hair smoother and easier to detangle.
• Helps maintain salon color between appointments.

Who is this for: Redken Acidic Bonding Concentrate Shampoo is intended for anyone with weakened, chemically processed, heat-damaged, or color-treated hair looking for a professional-grade, vegan and sulfate-free option. It suits all textures and lengths, especially those wanting concentrated repair from a single, salon-quality cleanser.

Ingredients

AQUA / WATER / EAU • DECYL GLUCOSIDE • SODIUM COCOYL ISETHIONATE • COCAMIDOPROPYL BETAINE • CITRIC ACID • SODIUM HYDROXIDE • PANTHENOL • GLYCERIN • DIMETHICONE • PEG-150 DISTEARATE • PPG-5-CETETH-20 • SODIUM BENZOATE • SODIUM CHLORIDE • PEG-55 PROPYLENE GLYCOL OLEATE • PROPYLENE GLYCOL • CARBOMER • PARFUM / FRAGRANCE • COCO-CAPRYLATE/CAPRATE • POLYQUATERNIUM-67 • SALICYLIC ACID • AMODIMETHICONE • SODIUM PHYTATE • GLYCOL DISTEARATE • COCO-BETAINE • ACRYLATES/BEHENETH-25 METHACRYLATE COPOLYMER • LIMONENE • TRIDECETH-6 • ALCOHOL • CETRIMONIUM CHLORIDE