K18 Molecular Repair Hair Oil 30ml

Repair damage, control frizz and add high-impact shine without weighing hair down with K18 Molecular Repair Hair Oil 30ml. This biotech-engineered, silicone-free hair oil combines patented K18PEPTIDE™ with lightweight plant-derived oils to work on two levels of the hair fiber: addressing damage associated with frizz within the hair while immediately smoothing frizz and flyaways at the surface.

Unlike heavier oils that mainly coat the hair, K18 Molecular Repair Hair Oil is designed to provide both repair and styling benefits. K18PEPTIDE™ helps strengthen damaged hair internally, while Avocado Oil, Sunflower Oil, hemisqualane and squalane help smooth the cuticle, enhance shine and improve softness without a greasy or heavy finish.

K18 reports 24-hour frizz control, 104% more shine, 78% reduction in split ends and heat protection up to 232°C / 450°F. The highly concentrated formula can be used on damp hair before styling or on dry hair as a lightweight finishing oil.

Repair → Strengthen → Control Frizz → Smooth → Protect → Shine

Why You'll Love It

• Clinically proven damage repair
• 24-hour frizz control
• 104% more shine
• 78% reduction in split ends
• Heat protection up to 232°C / 450°F
• Powered by patented K18PEPTIDE™
• Helps strengthen damaged hair
• Smooths frizz and flyaways
• Enhances color vibrancy
• Lightweight and highly concentrated
• Silicone-free
• Doesn't weigh hair down
• Works on damp or dry hair
• Suitable for all hair types

What Does K18 Molecular Repair Hair Oil Do?

Frizz isn't always simply a surface problem. Damaged hair is more vulnerable to irregular texture, roughness and moisture changes that can make frizz more noticeable.

K18 approaches this from inside and outside the hair fiber.

K18PEPTIDE™ works at the molecular level to address deeper damage associated with frizz, helping strengthen compromised hair.

At the surface, lightweight Avocado Oil, Sunflower Oil, hemisqualane and squalane nourish and smooth the cuticle, controlling flyaways while improving shine and color vibrancy.

This gives the oil a broader role than a traditional shine serum:

Damage Repair + Frizz Control + Split-End Improvement + Shine + Heat Protection

Who Is It For?

Ideal for:

• Damaged hair
• Bleached and highlighted hair
• Color-treated hair
• Heat-damaged hair
• Frizzy hair
• Hair prone to flyaways
• Dry, rough-looking ends
• Hair with visible split ends
• Dull hair lacking shine
• Fine hair that dislikes heavy oils
• Medium and coarse hair
• Straight, wavy, curly and coily textures
• Anyone regularly using blow-dryers or hot tools

Pair Me With

• K18 Leave-In Molecular Repair Hair Mask – intensive 4-minute molecular repair treatment for bleach, color, chemical and heat damage.
• K18 HeatBounce™ Conditioning Heat Protectant – dedicated cuticle-to-cortex heat protection for regular blow-drying and hot-tool styling.
• K18 DAMAGE SHIELD Protective Conditioner – lightweight everyday conditioning and protection against environmental and mechanical damage.

What's the Best Hair Oil for Frizz That Won't Make Fine Hair Greasy?

Heavy oils can smooth frizz but often create another problem for fine hair: flat, oily-looking lengths with less movement.

K18 Molecular Repair Hair Oil is specifically designed as a weightless, highly concentrated oil. K18 recommends beginning with only 1–3 drops and adding more only when needed.

It is also silicone-free. Instead, the surface-smoothing system uses lightweight ingredients including squalane, hemisqualane, Avocado Oil and Sunflower Oil.

This makes it particularly interesting when you want:

Frizz Control + Shine + Repair – Heavy or Greasy Finish

K18 Hair Oil or K18 Hair Mask – Which One Do I Need?

They are complementary products, not replacements.

K18 Leave-In Molecular Repair Hair Mask is the primary intensive treatment used after shampooing to repair accumulated damage.

K18 Molecular Repair Hair Oil combines molecular strengthening with styling benefits such as frizz control, shine, smoothing and heat protection. It can also be reapplied to dry hair between washes. K18 recommends using the oil with the mask for maximum molecular repair and additional styling benefits.

If using both:

Shampoo → K18 Mask → Wait 4 Minutes → K18 Molecular Repair Hair Oil

K18 specifically recommends layering them rather than mixing the two products together.

Can K18 Molecular Repair Hair Oil Protect Hair From Straighteners and Heat?

Yes. K18 Molecular Repair Hair Oil provides heat protection up to 232°C / 450°F.

For strengthening benefits as well as heat protection, apply 1–3 drops to damp, towel-dried hair from mid-lengths to ends and wait 4 minutes before styling.

For someone who frequently uses high heat, K18 HeatBounce™ remains the more specialized dedicated heat-protection product, while Molecular Repair Hair Oil adds the extra benefits of repair, frizz control, split-end improvement and shine.

Molecular Repair Hair Oil With Anti-Frizz Benefits | K18Hair

On Damp Hair

Apply 1–3 drops to towel-dried hair from mid-lengths to ends.

Start with less and build only when needed.

For the strengthening benefits of K18PEPTIDE™, wait 4 minutes before styling.

Then air-dry or style normally.

On Dry Hair

Apply 1–3 drops as a finishing treatment to:

Smooth frizz
Control flyaways
Add shine
Improve softness
Refresh dry-looking ends
With the K18 Hair Mask

Apply the K18 Leave-In Molecular Repair Hair Mask first to clean, damp hair.

Wait 4 minutes.

Apply K18 Molecular Repair Hair Oil.

K18 recommends another 4-minute wait after the oil for maximum strengthening results before styling.

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, Linalyl Acetate, Pinene, Rose Ketones, Terpineol, Tetramethyl Acetyloctahydronaphthalenes.