--- product_id: 383765053 title: "Leave-In Molecular Repair Hair Mask, Patented, Lasting Repair For Dry, Frizzy, Damaged Hair, Reverse Damage In 4 Minutes From Bleach, Color, Chemical Services + Heat" brand: "k18" price: "€ 64.99" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.hr/products/383765053-leave-in-molecular-repair-hair-mask-patented-lasting-repair-dry store_origin: HR region: Croatia --- # Works on all hair types & damage Patented K18PEPTIDE molecular tech 4-minute rapid repair Leave-In Molecular Repair Hair Mask, Patented, Lasting Repair For Dry, Frizzy, Damaged Hair, Reverse Damage In 4 Minutes From Bleach, Color, Chemical Services + Heat **Brand:** k18 **Price:** € 64.99 **Availability:** ✅ In Stock ## Summary > 🧴 Unlock your hair’s molecular magic in 4 minutes—because damaged hair is so last season. ## Quick Answers - **What is this?** Leave-In Molecular Repair Hair Mask, Patented, Lasting Repair For Dry, Frizzy, Damaged Hair, Reverse Damage In 4 Minutes From Bleach, Color, Chemical Services + Heat by k18 - **How much does it cost?** € 64.99 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/383765053-leave-in-molecular-repair-hair-mask-patented-lasting-repair-dry) ## Best For - k18 enthusiasts ## Why This Product - Trusted k18 brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Leave-In Convenience:** Skip conditioner—apply, wait, style. No rinse, no fuss, just flawless hair. - • **Visible Results Fast:** Noticeably smoother, stronger, and bouncier hair after only 2-3 uses—join the hair revolution. - • **Universal Hair Savior:** Effective on all hair types, including chemically treated, curly, and coily strands. - • **Instant Molecular Repair:** Transforms damaged hair in just 4 minutes—because your time is precious. - • **Patented K18PEPTIDE Technology:** Rebuilds hair from the inside out by reconnecting keratin chains for lasting strength. ## Overview K18 Leave-In Molecular Repair Hair Mask is a cutting-edge peptide treatment that reverses damage from bleach, color, chemical services, and heat in just 4 minutes. Using patented K18PEPTIDE technology, it repairs hair at the molecular level by reconnecting keratin chains, delivering stronger, smoother, and more resilient hair. Suitable for all hair types, this leave-in mask requires no rinsing and shows visible improvements after just a few uses, making it a must-have for professionals and trendsetters seeking lasting hair health. ## Description How does the K18 mask work? The K18 Mask works as a treatment to reverse damage in 4 minutes. It’s powered by our biomimetic K18PEPTIDE to seamlessly fit in and reconnect broken polypeptide chains at the molecular level. What is the K18PEPTIDE? K18PEPTIDE is a biotech-developed peptide that mimics hair’s structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during damage from bleach + color, chemical services, and heat. Why skip conditioner? Conditioner leaves a film that blocks our peptide from penetrating effectively. Once the 4-minute wait time is up, feel free to use a conditioner, a leave-in, or any type of product. I noticed there’s alcohol in the formula, isn’t that bad for you? We like to keep our formulas minimal, only using the exact amount of ingredients needed to get the peptide where it needs to go. Here the alcohol serves as an agent to optimize the hair environment for the K18 Mask to work on a deeper level. When should I expect to see results? Most see results after 2-3 uses. The more damaged the hair, the more dramatic the results so it may vary depending on your hair type and level of damage. Molecular Repair Mask Molecular Repair Oil Damage Shield Shampoo Detox Shampoo Damage Shield Conditioner AirWash Dry Shampoo AstroLift Volume Spray ## Features - 4-Minute Molecular Hair Repair Treatment: A leave-in peptide hair mask designed to repair and reverse damage at the molecular level for stronger, smoother, more resilient hair in just 4 minutes. - How It Works: Patented K18PEPTIDE repairs hair at a molecular level to reverse damage from bleach, color, chemical services, and heat*. The biotech-developed peptide mimics and clicks into hair's keratin structure to reconnect polypeptide chains and disulfide bonds for strength along the length + width of hair. - Works on All Hair Types: Because our hair treatment works at the innermost layer of the hair rather than only targeting the outer cuticle like many deep conditioning hair masks, it's effective on all strands, even coily and curly hair. - Boosts Strength + Smoothness: Helps improve texture, manageability, and bounce with a highly concentrated hair cream formula with detangling and softening benefits. Most see results after 2-3 uses. - How to Use: Shampoo, skip conditioner, and apply 1-3 pumps of the leave in hair mask to clean, towel-dried hair. Let sit for 4 minutes, do not rinse, then style as usual. Use for 4-6 consecutive washes, then as needed. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B09HR5KSR8 | | Best Sellers Rank | #1 in Hair Treatment Masks | | Item Model Number | K18-31007 | | Manufacturer | K18 | | Product Dimensions | 1.37 x 1.37 x 3.18 inches; 1.76 ounces | | Upc | 858511001289 746559900490 858511001371 | ## Product Details - **Brand:** K18 - **Hair Type:** Chemically Treated - **Item Form:** Cream - **Material Feature:** Cruelty Free ## Images ![Leave-In Molecular Repair Hair Mask, Patented, Lasting Repair For Dry, Frizzy, Damaged Hair, Reverse Damage In 4 Minutes From Bleach, Color, Chemical Services + Heat - Image 1](https://m.media-amazon.com/images/I/71WKpWKG6kL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: How does the K18 mask work?** A: The K18 Mask works as a treatment to reverse damage in 4 minutes. It’s powered by our biomimetic K18PEPTIDE to seamlessly fit in and reconnect broken polypeptide chains at the molecular level. **Q: What is the K18PEPTIDE?** A: K18PEPTIDE is a biotech-developed peptide that mimics hair’s structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during damage from bleach + color, chemical services, and heat. **Q: Why skip conditioner?** A: Conditioner leaves a film that blocks our peptide from penetrating effectively. Once the 4-minute wait time is up, feel free to use a conditioner, a leave-in, or any type of product. **Q: I noticed there’s alcohol in the formula, isn’t that bad for you?** A: We like to keep our formulas minimal, only using the exact amount of ingredients needed to get the peptide where it needs to go. Here the alcohol serves as an agent to optimize the hair environment for the K18 Mask to work on a deeper level. **Q: When should I expect to see results?** A: Most see results after 2-3 uses. The more damaged the hair, the more dramatic the results so it may vary depending on your hair type and level of damage. ## Customer Reviews ### ⭐⭐⭐⭐⭐ OMG! OMG ! OMG! K-18 FULFILLS ITS CLAIMS Read on! *by on Reviewed in the United States June 25, 2025* I’m over 55 and have spent decades trying everything — from $9 to $144 per product — hoping for softer, healthier hair. I have 3a curls hidden under years of color, heat damage, and dryness. My hair would break and frizz so badly it looked like I had layers (I don’t). K18 is the first and only product that actually delivered on its promise to repair — not just coat — my hair. I was fully prepared to return this if it did not make a difference. It did.This isn’t a conditioner or mask. K18 uses a patented technology that works from the inside out. I used a clarifying shampoo, applied 6 pumps (very small pumps from the "try it" bottle!), finger-raked it through damp hair, waited 4 minutes, and then combed through. No rinsing, no other products. I let my hair air-dry, and it already felt softer and smoother with significantly less frizz. No fragrance -makes me happy.Important note: You do not need to rub this aggressively between your palms to "activate" it — that’s a common myth. Just rub your palms lightly so you can apply it evenly and let the science do the work. It works on the keratin molecules to repair your hair from the inside out. Friction is not going to make the molecules smaller. Don't know why people start these rumors.The next morning, I used my straightener on medium heat and was stunned. Instead of the usual dry straw, my hair was sleek, shiny, and bouncy. Even the ends curled beautifully — something I’ve never seen on my hair before.After four treatments, my hair now feels different, although the greatest results came after the very first use. My hair is softer, smoother, more manageable, with less frizz and more shine. Even in Florida’s 90°+ heat and humidity, it holds up — and I’m not using anything else but K18. A friend even asked to try it after seeing my results.It’s expensive, but absolutely worth it. I’ve already bought the larger bottle. I’m sticking with K18 — this changed everything for me. And to address the expense, the 50mL pump provides 50 pumps. That's 25 applications for me. My average thickness, long hair uses 2 full regular pumps. After the first 4 applications, you move to every 4 washes. That means after the first four treatments, I have 21 treatments more still in the pump bottle. For me, with super dry hair, that means it will last another 18-21 weeks since I only wash once a week, and an occasional "extra". I am going to guess I have taken at least $100 of products that did not work for me to the women's shelter over that time, meaning the waste was as much as this effective product that takes no time to use, packs easily in a suitcase, doesn't stink and IT WORKS!If you have super straight, silky hair, like Asian hair, or other non-porous hair, I do not think you are going to get the same results. You probably already have the kind of hair those of us with porous, damaged hair are looking for.Ask ChatGPT ### ⭐⭐⭐⭐⭐ My Go-To Reset When My Hair Starts Looking Damaged *by on Reviewed in the United States June 4, 2026* I keep coming back to K18 whenever my hair starts looking dry, rough, or overprocessed, and it has become one of those products I consistently reorder. My hair goes through a lot between heat styling, color treatments, and everyday wear and tear, so there are times when it starts feeling brittle and losing its shine. This is usually the product I reach for when that happens.The application process is simple. After shampooing, I skip conditioner, towel dry my hair, and work a small amount through the mid-lengths and ends. A little really does go a long way. After letting it sit for the recommended four minutes, I style as usual.What stands out most is that it improves the condition of my hair without making it feel coated or heavy. Many repair products leave my hair soft initially but weigh it down or create buildup after repeated use. K18 manages to restore softness, smoothness, and bounce while still letting my hair feel like hair. I notice less frizz, better manageability, and a healthier appearance after just a few uses.I’ve used this treatment multiple times over the years whenever my hair needed extra help, and it consistently delivers. It works particularly well after periods of frequent heat styling or color processing when my ends start looking tired and dry.In summary, this remains one of the most effective repair treatments I’ve used. It helps bring damaged hair back to life, improves softness and manageability, and does so without sacrificing volume or weighing my hair down. It is one of the few hair treatments I continue to repurchase because the results are noticeable every time. ### ⭐⭐⭐⭐⭐ Absolutely Worth the Hype *by on Reviewed in the United States July 10, 2026* I’ve tried a lot of hair products over the years, and K18 is one of the few that actually lived up to its promises. After just a few uses, my hair felt noticeably softer, smoother, and much stronger. It helped reduce frizz, made my hair easier to brush, and gave it a healthier look without weighing it down.A little goes a long way, so the bottle lasts longer than I expected. I especially noticed a difference on my dry, damaged ends from heat styling and coloring. My hair looks shinier, feels healthier, and doesn’t break as easily.The price is definitely higher than most hair products, but because you only need a small amount and it actually works, I think it’s worth the investment. If your hair is damaged, overprocessed, or just needs some extra care, I highly recommend giving K18 a try. ## Frequently Bought Together - K18 Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Color, Chemical Services & Heat - K18 Damage Shield Protective Conditioner, Protects Hair from Daily Damage, Improves Strength & Shine, 8.5 Fl Oz - K18 Damage Shield Protective Shampoo, Reduces Frizziness & Tangles, Maintains Hair Health, 8.5 Fl Oz --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/383765053-leave-in-molecular-repair-hair-mask-patented-lasting-repair-dry](https://www.desertcart.hr/products/383765053-leave-in-molecular-repair-hair-mask-patented-lasting-repair-dry) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-28*