COSRX PEPTIDE-132 Ultra Perfect Hair Bonding Oil Serum — 28ml

Your Hair. Repaired from the Inside Out.

Every day your hair faces heat, brushing, color, pollution, and stress — and every day those encounters leave tiny fractures in the keratin structure that makes your hair strong, shiny, and soft. Most hair serums coat those fractures temporarily. The COSRX PEPTIDE-132 Ultra Perfect Hair Bonding Oil Serum actually fills them — permanently repairing broken keratin bonds at a molecular level with the world's first patented hair bonding peptide, delivering salon-grade restoration in a lightweight oil-serum you apply at home in seconds.

Formulated with patented PEPTIDE-132 that recharges hair protein and helps with hair keratin bonding — containing Vitamin E and 7 types of plant-based oils for hair nourishment and improved hair gloss. The result: visibly stronger, smoother, glossier hair — from the very first use.

What It Does

Repairs Broken Keratin Bonds — PEPTIDE-132™ is a patented repair peptide designed to protect and strengthen damaged hair. It bonds like puzzle pieces to keratin, the key protein in hair, filling in weakened areas and holding other beneficial ingredients in place.  This is fundamentally different from surface conditioning — it's structural repair at the molecular level.

Penetrates Deep into the Hair Cortex — At just 384.9 Da, PEPTIDE-132 is optimally sized to penetrate keratin effectively — absorbed and accumulated deep inside the hair, specifically bonding to weakened areas of keratin, filling in the gaps where protein is missing.  Traditional haircare works on the outer cuticle. PEPTIDE-132 goes deeper.

Delivers Instant Shine & Softness — Leaves a glossy, frizz-free finish without stickiness — absorbs instantly with no residue, leaving hair soft and smooth.  The 7-oil botanical complex envelops each strand in a lightweight protective veil that reflects light evenly for a visibly healthier, mirror-like shine.

Protects Against Daily Damage — Forms a lightweight protective barrier with nutrient-rich plant oils  that shields hair from the heat, friction, UV, and environmental stress that causes incremental damage with every day of normal life.

Works for All Hair Types &; Damage Levels — For all damage levels — from mild dryness to severe chemical damage. For frizzy, brittle, or dull hair in need of hydration and shine. For flyaways, split ends, and rough textures that need smoothing.

Key Ingredients

Patented PEPTIDE-132™ (Tripeptide-132 HCl) — A tripeptide composed of three amino acids, each with a different function — each amino acid has the unique ability to be absorbed into the hair, form keratin bonds, and strengthen the hair. Song of Skin Engineered after simulating thousands of formulas and considering 20+ amino acids, this is the only peptide in the world specifically developed for continuous, fundamental hair keratin repair.

7-Type Botanical Oil Complex — Olive Oil, Argan Kernel Oil, Camellia Seed Oil, Jojoba Oil, Rice Bran Oil, Macadamia Seed Oil, and Grape Seed Oil — each oil selected for its unique affinity with the hair's lipid structure, delivering moisture lock, frizz control, and lasting shine without any greasy buildup or residue.

Tocopherol (Vitamin E) — 7 naturally derived oils optimized and enriched with Vitamin E help support antioxidant care for hair  — neutralizing free radical damage from UV and heat exposure that degrades hair protein and dulls shine over time.

18-Type Amino Acid Complex — The fundamental building blocks of keratin — including Arginine, Serine, Glycine, Threonine, Leucine, and Proline — that replenish the hair's protein reserves, support elasticity, and maintain the structural integrity of every strand from root to tip.

Who Is It For?

The COSRX PEPTIDE-132 Hair Bonding Oil Serum is ideal for:

Color-treated, bleached, or chemically processed hair

Heat-damaged hair from daily blow-drying, curling, or straightening

Frizzy, brittle, or rough-textured hair lacking shine and softness

Fine hair that needs lightweight nourishment without weighing strands down

Anyone wanting a daily leave-in treatment that repairs and protects simultaneously

All hair types — straight, wavy, curly, and coily

Free from harmful additives. Cruelty-free and 100% made in Korea.

How to Use

Apply an appropriate amount to dry or damp hair from mid-length to ends. Avoid the scalp area. Style as usual — no rinsing required. For best results, use as the final step after the COSRX PEPTIDE-132 Shampoo and Treatment.

💡 Pro Tip: Apply to damp hair immediately after towel-drying for maximum PEPTIDE-132™ absorption — the open cuticle after washing allows the peptide to penetrate deepest into the cortex where repair is needed most.