K18 Molecular Repair Hair Oil 1 fl oz — strengthening peptide oil for damaged hair, 24-hour frizz control & heat protection

K18 Molecular Repair Hair Oil is a lightweight, biotech-formulated oil that strengthens damaged hair, reduces frizz for up to 24 hours, and adds high-shine protection without silicones.

Designed to work on all hair types, this 1 fl oz oil combines K18's patented peptide technology with nourishing plant oils to repair damage at two levels: inside the hair fiber and on the cuticle surface. Its featherweight, non-greasy formula improves manageability and color vibrancy while providing heat protection for styling tools. Use a few drops on damp hair after the K18 Molecular Repair Hair Mask or apply to dry ends to finish and smooth.

How does this oil repair and control frizz?

The oil pairs the patented K18PEPTIDE with emollient oils to target both structural damage and surface roughness. The peptide works at the inner hair layers to strengthen compromised fibers, while lightweight oils seal the cuticle to block moisture-triggered frizz.

• Strengthens hair fiber with K18PEPTIDE for long-term repair.
• Smooths the cuticle to reduce surface friction and flyaways.
• Silicone-free, minimizing buildup while improving manageability.
• Boosts shine and color vibrancy without weighing hair down.

Will it protect my hair from heat styling?

Yes — the formula is designed to help shield hair from styling temperatures up to 450°F when used as directed, helping prevent additional damage during blow-drying, straightening, or curling. It also helps decrease split ends when incorporated into a regular care routine.

• Heat protection up to 450°F for safer styling sessions.
• Reduces split ends when used consistently as part of a repair routine.
• Works on both damp hair pre-styling and dry hair as a finishing product.

How do I use just the right amount for my hair type?

Start small: 1–3 drops and build from there. Apply to towel-dried hair from mid-lengths to ends to repair and control frizz; use a drop or two on dry strands to smooth, tame flyaways, and add shine as a finishing oil.

• Fine hair: 1 drop, focus on ends to avoid weighing roots down.
• Medium hair: 2 drops distributed through mid-lengths and ends.
• Thick or very dry hair: 3+ drops, layering as needed for extra nourishment.
• Use after K18 Molecular Repair Hair Mask to amplify strengthening effects.

What ingredients give it shine without heaviness?

The lightweight blend relies on avocado oil, sunflower oil, hemisqualane, and squalane to nourish and reflect light without leaving residue. This combination enhances shine, improves color vibrancy, and feels weightless on the hair.

• Avocado and sunflower oils for softening and nourishment.
• Hemisqualane and squalane for silky slip and non-greasy sheen.
• Silicone-free formulation to prevent buildup and maintain hair volume.

Who is this for: K18 Molecular Repair Hair Oil suits anyone seeking to repair chemically or thermally damaged hair while keeping hair light, glossy, and manageable. It's a practical addition for people who heat-style regularly, have color-treated or frizz-prone hair, or want a finishing oil that won’t weigh hair down. Use it alone for everyday smoothing or pair it with the K18 Molecular Repair Hair Mask to maximize structural repair and frizz control.

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.