K18 Molecular Repair Hair Oil — Strengthening Peptide Treatment, 0.34 fl oz, Frizz Control & Heat Protection

K18 Molecular Repair Hair Oil is a lightweight, silicone-free treatment oil formulated with the patented K18PEPTIDE to strengthen hair, reduce frizz, and add lasting shine.

This biotech-formulated hair oil works on multiple layers of the strand to address the structural weaknesses that cause frizz and dullness. Designed for daily styling and targeted repair, the formula combines the brand's peptide technology with nourishing oils like avocado and sunflower plus squalane derivatives to hydrate, smooth, and protect without weighing hair down.

How does this oil actually reduce frizz and reverse damage?

The product targets two sources of frizz: internal fiber damage and raised cuticle surfaces. K18PEPTIDE is formulated to reach the inner cortex to reinforce the fiber, while the oil components smooth the outer cuticle layer for immediate manageability and shine.

• Peptide technology designed to interact with the hair's inner structure for strengthening.
• Light emollients (hemisqualane, squalane) that smooth cuticles and reduce flyaways.
• Botanical oils (avocado, sunflower) for hydration and color vibrancy without buildup.
• Weightless texture keeps hair soft rather than greasy.

Can I use this oil with heat styling and how much protection does it provide?

Use the oil as part of your styling routine to help guard hair from further heat-related stress. The formula is engineered to deliver heat resilience when applied before blow-drying or using hot tools, helping minimize additional frizz and split-end formation.

• Apply to damp hair before blow-drying for heat-adaptive protection.
• Use sparingly on dry ends as a finishing step after styling for extra smoothing.
• Light texture avoids weighing down blowouts or curls.

What is the right amount and how should I apply it for best results?

A little goes a long way: start with 1–3 drops and increase only if needed. Work the oil through mid-lengths to ends on towel-dried hair for repair and frizz control, or smooth a tiny amount over dry strands to tame flyaways and boost shine.

• For fine hair: 1 drop, focusing on ends.
• For medium hair: 2 drops, mid-lengths to ends.
• For thick or coarse hair: 3 drops or more, distributed evenly.
• Use after a strengthening mask (like K18 Molecular Repair Hair Mask) for a complete routine.

Will this oil add shine without buildup or a greasy feel?

The formula is silicone-free and designed to boost surface shine while remaining lightweight. Emollients like hemisqualane and squalane deliver gloss and slip but are chosen to minimize residue, so hair looks polished rather than heavy.

• Shine-enhancing oils that absorb quickly into the hair surface.
• No silicones for a non-greasy finish and less long-term buildup.
• Formulation supports color vibrancy and reduces dullness.

Who is this for: K18 Molecular Repair Hair Oil suits anyone wanting targeted strengthening and styling support — from chemically treated and heat-styled hair to natural textures seeking frizz control and extra shine. Use it in small amounts on fine hair, or build up on coarser hair types; it pairs well with the K18 Molecular Repair Hair Mask as part of a repair-focused routine.

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.