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jumbo leave-in molecular repair hair mask
Description
A leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. The K18PEPTIDE™ is clinically proven to repair damage from bleach + color, chemical services and heat* – with immediate and lasting results to restore strength, softness, smoothness and bounce to hair.
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*k18hair.co.uk/disclaimers
2. Apply 1-3 pumps based on your length and density, starting at the ends and working up towards the roots.
3. Let sit for 4 minutes. Do not rinse out.
4. Comb, add styling product + style as usual. Use for 4-6 washes, then as needed.
- Lisa T.Verified ReviewerReviewingJumbo Leave-In Molecular Repair Hair Mask 100mLI recommend this productAge 35 - 44Hair Concern Chemical damage, Color-care, Frizz, Fragile/brittle hair, DrynessHair Type Fine/Thin, Medium Density, Straight/WavyMy Results Visible Difference, Stronger Hair, Soft Touchable Hair, Shinier Hair, Defined Curl/Wave PatternRated 5 out of 5 stars19 hours agoAfter one use
I recently bleached my hair and have toned it a few times. The first picture is before, and then after one use of K18. I used a clarifying shampoo and then applied the K18 on damp hair. I was nervous about having to brush it after (clarifying without conditioner) but it combed through so easily.
I feel like the visual appearance, structural strength, and overall uniformity of my hair have improved by at least 20%. The more porous areas looked dull before, and I’ve already noticed more brightness and better blending. Overall, my hair looks and feels healthier and noticeably more reflective, without feeling coated.
I honestly think this product is amazing and well worth it. You can buy product after product that improves your hair maybe 5% or less, and sometimes the results are only temporary. Or you can get this and have real, noticeable results.
Wish I could have told myself this sooner.
- AndreeaVerified BuyerReviewingJumbo Leave-In Molecular Repair Hair Mask 100mLI recommend this productRated 5 out of 5 stars2 days agoFirst time tried k18
Wow I have no words regarding this product I finally have the real one after i bought a fake one lol u can definitely feel the hair in such a great condition after been bleached 3 times now is in a very delicate state not quiet broken , but after applying the mask hair feels very strong smooth I wonder if I should still blow dry my hair or is best to air dry? Thank you k18 for such wonderful product worth every penny
KUK18Hair UK2 days agoThank you so much for your incredible review, Andreea! We're absolutely thrilled to hear that our Jumbo Leave-In Molecular Repair Hair Mask is making such a difference after your hair has been through three bleaching sessions - there's no better compliment than knowing our molecular repair technology is bringing your delicate hair back to feeling strong and smooth! For your hair care routine, both air drying and blow drying work beautifully with our treatment, so feel free to choose whatever method fits your lifestyle best. We're so happy you finally have the authentic product and can experience the real K18 magic! ❤️
- Rebecca M.Verified BuyerReviewingLeave-In Molecular Repair Hair Mask SampleI recommend this productRated 5 out of 5 stars3 days agoMakes me hair feel like silk!
I love this stuff! I’ve got wavy, bleached hair and this is better than olaplex! Makes my hair go from hay to silk!
KUK18Hair UK2 days agoThank you so much for your incredible review, Rebecca! We're absolutely thrilled to hear that our Leave-In Molecular Repair Hair Mask Deluxe Sample is transforming your wavy, bleached hair from hay to silk - there's no better compliment than knowing our molecular repair technology is outperforming other treatments and giving you that luxurious silky feel you deserve! ❤️
- Olena F.Verified BuyerReviewingLeave-In Molecular Repair Hair Mask SampleRated 3 out of 5 stars1 week agoNice but small
I purchased the full-size mask and also received a deluxe sample of the Leave-In Molecular Repair Hair Mask. Because I own the full size, I can say that the product does help — I do see positive results in my hair. It feels smoother and healthier with consistent use.
That said, the sample itself is only enough for one application, so if someone is trying it for the first time, one use is really not enough to decide whether it’s a must-have or not.
My main concern is the value. The mask works nicely, but it gets used up very quickly. Realistically, you need at least three pumps per use, and the bottle is only 100 ml, so it doesn’t last long.
It’s also frustrating that larger, more affordable sizes are only available to licensed hairdressers. As a regular customer, you’re stuck paying the premium price, which honestly feels limiting and a bit unfair.
Overall, it’s a good product with visible benefits, but I’m still unsure if it’s truly worth the price for the amount you get.
KUK18Hair UK4 days agoThank you so much for your detailed and honest feedback — we truly appreciate you sharing your experience. We’re so glad to hear you’re seeing smoother, healthier results with consistent use. That’s exactly what we hope for.
With K18, less really is more. Because the formula is highly concentrated, most clients only need 1–3 pumps total, depending on hair length, thickness, and density. For many hair types, starting with 1 pump and adding more only if needed is key. Using more than necessary won’t improve results and can cause you to go through the product more quickly than intended. We also understand your concerns about value and sizing. We truly appreciate your perspective and your continued support. If you’d ever like personalized guidance on usage amounts based on your specific hair type, we’re happy to help. - Laura K.Verified BuyerReviewingMini Leave-In Molecular Repair Hair Mask 15 mLI recommend this productAge 55 - 64Hair Concern Chemical damage, Heat damage, Color-care, Frizz, Fragile/brittle hairHair Type Fine/Thin, Thick/Coarse, Grey Hair, Curly/CoilyMy Results Less Frizz, Visible Difference, Stronger Hair, Less Breakage, Shinier HairRated 5 out of 5 stars1 week agoThis is THE best product
I can’t not use this product. Sad when you get your hair done and come home to rewash it because you miss your product in your hair. This product changed my hair texture. It is the best!!
KUK18Hair UK1 week agoThank you so much for your incredible review, Laura! We're absolutely thrilled to hear that our Mini Leave-In Molecular Repair Hair Mask has become such an essential part of your routine that you can't imagine going without it - there's no better compliment than knowing our molecular repair technology has transformed your hair texture so beautifully that even after a salon visit, you need to come home and use our treatment to feel complete! ❤️
