K18 Molecular Repair Hair Mask 50ml

K18 Molecular Repair Hair Mask 50ml

£70.00 Save £-70.00
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K18 Molecular Repair Hair Mask 50ml

The K18 Molecular Repair Hair Mask is a leave-in treatment that works at a molecular level to repair damage caused by colouring, bleaching, heat and chemical services. Clinically proven to restore strength, softness and elasticity, this mask helps bring hair back to its healthiest state from the inside out.

Powered by K18’s patented peptide technology, the mask reconnects broken keratin chains within the hair fibre, improving hair condition, reducing breakage and enhancing shine. The result is hair that feels stronger, smoother and more resilient, while also supporting longer-lasting colour and improved manageability.

Why we love it at Arena

Healthy hair is the foundation of great colour. K18 improves the overall condition of the hair, allowing colour to look richer, shinier and more even, while protecting the integrity of the hair long term.

Suitable for

  • All hair types and textures

  • Coloured, bleached or chemically treated hair

  • Heat-damaged or compromised hair

  • Fine hair that needs repair without heaviness

How to use

  1. Shampoo your hair and towel-dry thoroughly

  2. Apply 1–3 pumps depending on hair length and thickness

  3. rub together in hand until a thicker white consistency appears 

  4. Work evenly through mid-lengths and ends

  5. Leave in for 4 minutes

  6. Do not rinse out

  7. Style as usual

Use in place of conditioner. For best results, use every wash for the first 4–6 washes, then as needed to maintain hair health.

When to use

  • After colour or lightening services

  • When hair feels dry, weak or damaged

  • As part of your regular home care routine to maintain salon results

Key benefits

  • Repairs damage at a molecular level

  • Strengthens hair from the inside out

  • Improves softness, shine and elasticity

  • Helps maintain colour and salon results

  • Lightweight, leave-in formula with no build-up

A little goes a long way, making the 50ml size perfect for maintaining healthy, beautiful hair at home between salon visits.