Redken Acidic Bonding Curls Leave-In Treatment for Curly & Coily Hair — 3A–4C, Heat Protectant & Repair

Redken Acidic Bonding Curls Leave-In Treatment is a silicone-free leave-in that repairs weakened curl bonds, defines curls and coils, detangles, and protects hair from heat up to 450°F.

Designed specifically for curl patterns 3A–4C, this lightweight leave-in joins Redken’s Acidic Bonding Curls system to restore curl structure without silicones, sulfates, or parabens. Formulated with Curl-Bond Technology — citric acid, urea, and glycine — plus nourishing avocado and camelina oils, it targets internal bond rebuilding and surface hydration for softer, more resilient curls after a single use.

How does this leave-in help damaged curls become stronger?

The formula works on multiple levels: citric acid helps rebalance cuticle acidity to support bond rebuilding, urea and glycine penetrate to reinforce internal structure, and oils seal moisture for elasticity. Together these ingredients make curls less prone to breakage and improve pattern definition.

• Curl-Bond Technology with citric acid, urea and glycine
• Targets internal bond repair and external hydration
• Reduces appearance of split ends and increases resilience

What styling and protection benefits will I see for my curls?

Beyond repair, the leave-in defines and controls frizz while providing long-lasting body and hold. It also acts as a heat protectant rated up to 450°F, so curls retain shape and moisture during hot-tool styling or diffuse drying.

• 72-hour hydration and frizz control when used within the system
• Full body and volume for up to 96 hours*
• Heat protection up to 450°F for safer styling

How does it improve manageability and detangling on textured hair?

The lightweight conditioning agents smooth strands and reduce friction, making detangling faster and gentler. In consumer testing the leave-in delivered dramatically easier comb-through, plus smoother and more conditioned hair after use.

• Helps make hair up to 12x easier to detangle*
• 12x smoother feel and 12x improved conditioning vs. non-conditioning shampoo*
• Silicone-free slip from nourishing oils for gentle combing

Will this work with color-treated or coily hair?

Yes — the formula is safe for color-treated curls and is created for the full range of curly and coily textures (3A–4C). It’s part of Redken’s first silicone-free bonding collection, suitable for those seeking vegan-friendly options without sulfates, silicones, or parabens.

• Formulated without sulfates, silicones, or parabens
• Vegan-friendly ingredients and suitable for color-treated hair
• Optimized for curl patterns from loose waves to tight coils

Who is this for: This leave-in is built for people with textured hair who want to rebuild curl integrity while improving definition, manageability, and heat styling safety. Ideal for anyone experiencing breakage, frizz, or loss of curl pattern — especially those who prefer silicone-free, salon-grade care and who use Redken’s Acidic Bonding Curls shampoo and conditioner for the best cumulative results.

*Based on consumer test results and system comparisons as reported by Redken; individual results may vary.

Ingredients

1218393RK4 - INGREDIENTS: AQUA / WATER / EAU • SORBITOL • CETEARYL ALCOHOL • GLYCERIN • BEHENTRIMONIUM CHLORIDE • PERSEA GRATISSIMA OIL / AVOCADO OIL • BIS-DIGLYCERYL POLYACYLADIPATE-2 • TOCOPHERYL ACETATE • CAMELINA SATIVA SEED OIL • PHENOXYETHANOL • HYDROXYETHYL UREA • CETYL ESTERS • PARFUM / FRAGRANCE • ISOPROPYL ALCOHOL • POLYQUATERNIUM-37 • SODIUM CITRATE • POLYQUATERNIUM-4 • PROPYLENE GLYCOL DICAPRYLATE/DICAPRATE • CITRIC ACID • PECTIN • LIMONENE • PPG-1 TRIDECETH-6 • GLYCINE • SUCROSE • LINALOOL • ACRYLATES/STEARYL METHACRYLATE COPOLYMER • SORBITAN OLEATE • CITRONELLOL • CITRAL • EUGENOL • EDTA • TOCOPHEROL • HELIANTHUS ANNUUS SEED OIL / SUNFLOWER SEED OIL • ROSMARINUS OFFICINALIS LEAF EXTRACT / ROSEMARY LEAF EXTRACT (F.I.L. T70033286/1).