Redken Acidic Bonding Concentrate Shampoo 33.8 fl oz — Sulfate-Free, Color-Safe Repair for Damaged Hair

Redken Acidic Bonding Concentrate Shampoo is a sulfate-free, vegan professional cleanser that strengthens weakened hair bonds, repairs damage, and helps protect color in one concentrated formula.

Designed as Step 1 in Redken's most concentrated repair system, this thick, ultra-rich shampoo uses citric acid plus Redken's Bonding Care Complex to target breakage, visible split ends, and surface roughness. A little product goes a long way: the dense texture coats strands efficiently so you can start with a small amount and adjust to your hair length and porosity. It’s formulated to be color-safe, vegan, and free of sulfates, making it a go-to choice for processed, chemically treated, and naturally fragile hair seeking stronger fiber and smoother feel.

How does this shampoo rebuild weak or damaged hair?

The formula works at the strand level, using bonding technology to reinforce areas where the hair structure has been compromised. Citric acid helps smooth the hair cuticle while the Bonding Care Complex supports internal bond integrity, improving resilience and reducing snap.

• Reinforces internal bonds to lower breakage during styling.
• Covers strands with a rich texture for even distribution.
• Smooths cuticle layers to improve overall strength and manageability.

Will it preserve salon color and reduce fading?

Yes—its acidic pH and sulfate-free, gentle surfactants help seal the cuticle and minimize pigment loss. The product is formulated specifically to be color-safe, so it cleans without stripping color molecules or drying hair excessively.

• Acidic formulation helps close the cuticle to lock in color.
• Sulfate-free cleansing prevents harsh pigment removal.
• Thick consistency reduces overuse, protecting treated hair from excess rinsing.

How should I use this concentrated shampoo for best results?

Because the shampoo is highly concentrated, begin with a quarter-sized amount and add more only if needed. Work into wet hair, lather, rinse, and follow with Redken Acidic Bonding Concentrate conditioner and treatments for full system benefits.

• Start small—a little covers a surprising amount of hair.
• Use with the matching conditioner and leave-in steps for maximum repair.
• Ideal for regular use on color-treated and chemically processed hair.

What visible improvements can I expect and how quickly?

When used as part of the complete Acidic Bonding Concentrate system, users see reduced breakage and fewer visible split ends along with smoother texture. Results will vary by hair condition, but improvements in manageability and strength commonly appear after a few uses with full-system application producing the most dramatic changes.

• Reported reductions in breakage and visible splits with system use.
• Smoother, easier-to-style hair from the first few washes.
• Enhanced conditioning and resilience for chemically treated strands.

Who this is for: Professional stylists and home users who want an intensive, salon-grade repair shampoo suitable for all hair textures, especially chemically processed, color-treated, heat-damaged, or brittle hair. If you’re aiming to strengthen compromised strands while preserving color and improving smoothness, this concentrated, vegan, sulfate-free formula is formulated to be a practical first step in a targeted repair routine.

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