K18 Molecular Repair Hair Oil

Reparative finishing oil for shine, frizz control, and heat protection

✓CGM ApprovedContains ProteinStep: Finish

Where to Buy

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K18 Hair UK

In stockBest price

£65.00Buy

Our Take

A lightweight, silicone-free hair oil powered by K18PEPTIDE™ alongside squalane, avocado oil, and sunflower oil. Works as a finishing product applied to damp or dry hair — start with one to two drops on the mid-lengths and ends and build if needed. Adds shine, reduces frizz, and provides traditional heat protection on the outer hair layers. Can be layered on top of the K18 mask after the four-minute processing window. Notably less controversial for CGM followers than the mask itself, as it contains no drying alcohols or sulphates. A useful all-rounder for curly and wavy hair that needs a lightweight finishing step without silicone.

Who is this for?

Our assessment — not the brand's claim

Curl Pattern

Porosity

LowNormalHigh

Free From

✓ Sulphate-Free✓ Silicone-Free✓ Paraben-Free✓ Alcohol-Free

Ingredients at a Glance

⚠ 1 CGM-Flagged Ingredient

Squalane

Emollient

Lightweight emollient that mimics natural skin oils. Excellent for curls.

Avocado Oil

Oil

Nutrient-rich oil that penetrates and strengthens hair.

Sunflower Seed Oil

Oil

Lightweight oil rich in vitamin E and oleic acid.

C13-15 Alkane

Emollient

Plant-derived emollient with light texture.

K18PEPTIDE

Peptide

Free From

✓ Sulphate-Free✓ Silicone-Free✓ Paraben-Free✓ Alcohol-Free

Want to know more about an ingredient? Browse the ingredient glossary →

How to Use

Apply 1–3 drops to damp or dry hair, focusing on mid-lengths to ends. Build as needed. Use as a finishing step after styling, as a light heat protectant before blow-drying, or layered on top of the K18 mask after the 4-minute processing time. Avoid the roots on fine or oily hair.