K18 Molecular Repair Hair Oil — 1 fl oz strengthening peptide oil, 24‑hr frizz control & heat protectant

K18 Molecular Repair Hair Oil is a lightweight, peptide-strengthening hair oil that repairs damage, controls frizz for 24 hours, and protects up to 450°F while boosting shine.

Engineered with the patented K18PEPTIDE and nutrient-rich oils, this 1 fl oz treatment works on all hair types to address the root causes of frizz and breakage. Unlike surface-only serums, it targets two levels of the hair fiber: reinforcing the inner structure and smoothing the cuticle exterior. The formula is silicone-free, weightless, and designed to layer easily into salon or at-home routines—use it after your K18 Molecular Repair Hair Mask or as a standalone finishing oil.

How does this oil actually reduce frizz throughout the day?

The oil combines a peptide-led repair action with cuticle-smoothing emollients to both reverse damage and seal the hair surface. That dual action helps strands lie flatter and resist humidity-driven swelling that causes frizz. It's formulated to provide immediate manageability and progressive improvement with repeated use.

• K18PEPTIDE repairs inner fiber damage that contributes to frizz.
• Avocado and sunflower oils nourish without weighing hair down.
• Lightweight squalane and hemisqualane smooth the cuticle for long-lasting control.

Will this weigh my hair down or leave residue?

No—this oil is explicitly formulated to be weightless and silicone-free, minimizing buildup on strands. A small amount (1–3 drops to start) disperses easily and enhances shine without greasiness. It’s safe for fine to thick hair when dosed appropriately.

• Start with 1–3 drops; increase only as needed for thicker hair.
• Absorbs into mid-lengths and ends, avoiding root heaviness.
• No silicones means less long-term buildup on hair fibers.

How does the oil protect hair from heat styling?

The formula offers heat protection up to 450°F, helping reduce further damage caused by hot tools. It forms a light barrier that complements the peptide repair, so styling can be less disruptive to the hair’s structure. Use it before blow-drying or flat-ironing for best protection and smoother results.

• Applies to damp or dry hair to guard against heat damage.
• Helps reduce split ends when used as part of a regular routine.
• Works alongside styling tools to preserve shine and manageability.

How should I use K18 Molecular Repair Hair Oil in my routine?

Apply a few drops to towel-dried hair from mid-lengths to ends to repair and control frizz; apply to dry hair as a finishing step for shine and smoothness. It layers well after the K18 Molecular Repair Hair Mask but can also be used alone for daily touch-ups. Adjust quantity by hair density and length to avoid overapplication.

• Start with 1–3 drops on damp hair, increase for thicker or longer hair.
• Use after the K18 Molecular Repair Hair Mask for a complete routine.
• Apply a tiny amount to dry ends to tame flyaways and add shine.

Who is this for: K18 Molecular Repair Hair Oil is ideal for anyone wanting to strengthen damaged strands, reduce frizz, and add measurable shine without heavy silicones—suitable for colored, heat-styled, chemically treated, or naturally dry hair. If you want both immediate smoothing and cumulative repair from a single, lightweight oil, this treatment fits into daily styling or targeted repair routines.

Ingredients

Caprylyl Caprylate/Caprate, Squalane, Persea Gratissima (Avocado) Oil, Helianthus Annuus (Sunflower) Oil, C13-15 Alkane, Undecane, Benzyl Alcohol, Tridecane, Castor Isostearate Succinate, Propanediol, sh-Oligopeptide-78, Fragrance (Parfum), Tocopherol, Cinnamal, Hexyl Cinnamal, Limonene, Linalool.