Redken Acidic Bonding Curls Sulfate-Free Shampoo — For Curly & Coily Hair (3A–4C), Bond-Building + Hydrating

Redken Acidic Bonding Curls Sulfate-Free Shampoo is a silicone-free, bond-building shampoo designed to gently cleanse, repair and define damaged curly and coily hair (ideal for curl patterns 3A–4C).

This lightweight, sulfate-free formula uses Redken’s Curl-Bond Technology (citric acid, glycine and urea) combined with nourishing oils—avocado and coconut—and shea butter to help restore curl strength and improve moisture without weighing strands down. It’s made to work as part of the Acidic Bonding Curls system (shampoo, conditioner and leave-in) to enhance curl pattern, reduce frizz and aid detangling while staying silicone- and sulfate-free.

How does this shampoo repair and strengthen damaged curls?

The formula targets internal bond rebuilding with ingredients that support hair fiber integrity rather than just coating the strand. Citric acid, glycine and urea in Curl-Bond Technology help reinforce weakened areas while moisturizing agents improve elasticity for fewer breakages during styling.

• Curl-Bond Technology: citric acid, glycine and urea to support internal bond repair
• Hydrating agents: avocado oil, coconut oil and shea butter for moisture and softness
• Sulfate-free cleansing: removes buildup gently without stripping natural oils
• Silicone-free: maintains natural curl pattern and reduces buildup over time

Will this shampoo help with frizz and curl definition?

When used with the matching conditioner and leave-in, the system is formulated to reduce frizz and improve curl shape by hydrating strands and smoothing cuticles. The lightweight nature of the shampoo keeps curls buoyant so pattern and volume remain intact.

• System results: clinically reported improvements in frizz control and curl definition when used together
• Lightweight moisture: hydrates without weighing curls down for longer-lasting shape
• Cuticle care: smoothing ingredients help reduce friction and frizz between washes

How does it feel and perform during washing and detangling?

The shampoo produces a gentle lather that cleans the scalp and hair while keeping strands supple for easier handling. Formulated to lift residue without harsh surfactants, it improves wet combing and reduces tugging on sensitive curls and coils.

• Gentle cleanse: sulfate-free surfactants clean without over-drying
• Improved manageability: helps detangle and reduce breakage in wet hair
• Compatible with color-treated hair: vegan-friendly and formulated for treated curls

What key ingredients should I expect and why do they matter?

The blend centers on bond-supporting actives plus natural emollients that replenish lost lipids and aid flexibility. Together they aim to restore resilience to fragile curl structures while delivering hydration and softness.

• Citric acid: helps rebalance pH and support bond-building actions
• Glycine and urea: support internal fiber repair and moisture retention
• Avocado & coconut oils, shea butter: provide lasting hydration and improved elasticity

Who is this for: Redken Acidic Bonding Curls Sulfate-Free Shampoo is intended for people with curly or coily hair types—especially 3A through 4C—who want a silicone-free, hydrating cleanser that helps rebuild curl strength and improve definition. It suits chemically treated or naturally damaged curls seeking gentler cleansing, enhanced manageability and smoother, more resilient texture when used as part of the full Acidic Bonding Curls routine.

Ingredients

1218391RK44 - INGREDIENTS: AQUA / WATER / EAU • SODIUM COCOYL ISETHIONATE • DECYL GLUCOSIDE • COCAMIDOPROPYL BETAINE • SORBITOL • CITRIC ACID • HYDROXYETHYL UREA • POTASSIUM HYDROXIDE • POTASSIUM COCOYL GLYCINATE • PPG-5-CETETH-20 • PANTHENOL • SODIUM BENZOATE • HYDROXYPROPYL GUAR HYDROXYPROPYLTRIMONIUM CHLORIDE • SODIUM CHLORIDE • PEG-55 PROPYLENE GLYCOL OLEATE • PROPYLENE GLYCOL • PARFUM / FRAGRANCE • CAPRYLYL GLYCOL • ACRYLATES/C10-30 ALKYL ACRYLATE CROSSPOLYMER • PEG-150 DISTEARATE • POLYQUATERNIUM-10 • POTASSIUM COCOATE • COCO-CAPRYLATE/CAPRATE • SALICYLIC ACID • GLYCOL DISTEARATE • BUTYROSPERMUM PARKII BUTTER / SHEA BUTTER • PERSEA GRATISSIMA OIL / AVOCADO OIL • LIMONENE • GLYCINE • COCO-BETAINE • LINALOOL • TOCOPHEROL • HELIANTHUS ANNUUS SEED OIL / SUNFLOWER SEED OIL • ROSMARINUS OFFICINALIS LEAF EXTRACT / ROSEMARY LEAF EXTRACT (F.I.L. T70038194/2).