K18 Hair Mask vs Olaplex

When it comes to repairing damaged hair, two treatments have taken the haircare world by storm: K18 and Olaplex. Both products claim to strengthen and restore your hair, but which one is truly the best? In this article, we will compare the K18 hair mask and Olaplex to determine which treatment reigns supreme.

Overview of K18 and Olaplex

Overview Of K18 And Olaplex

Olaplex burst onto the scene in 2014, offering a revolutionary bond-building technology that repairs damage and strengthens hair from the inside out. It quickly became a staple in salons and gained a loyal following among stylists, beauty editors, and celebrities. On the other hand, K18 is a newer player in the haircare market, offering a unique leave-in molecular repair hair mask that promises to restore your hair to its previous state.

Benefits of Olaplex

Olaplex’s patented Bond Building Technology™ rebuilds broken disulfide bonds in the hair, resulting in stronger and healthier strands. It is known for its ability to repair and prevent damage, making it a popular choice for those with chemically treated or heat-damaged hair. Olaplex No. 3 Hair Perfector, a weekly pre-shampoo treatment, is particularly beloved for its impressive results.

Introducing K18 Hair Mask

K18 takes a different approach to hair repair. Its leave-in molecular hair mask works by reconnecting polypeptide chains in the hair, strengthening it from the inside out. The mask offers a full 360-degree approach to hair repair, addressing both the length and width of the hair. While K18 is a more recent addition to the haircare market, it has quickly gained attention for its immediate and effective results.

Comparison: Ingredients

Comparison: Ingredients

Ingredients K18 Hair Mask Olaplex
Water (Aqua) Yes Yes
Sodium Lauroyl Methyl lsethionate Yes No
Cocamidopropyl Hydroxysultaine Yes No
Potassium Cocoyl Glycinate Yes No
Disodium Cocoyl Glutamate Yes No
Sodium Lauroyl Sarcosinate Yes No
Potassium Cocoate Yes No
Decyl Glucoside Yes No
Glycereth-26 Yes No
Bis-Aminopropyl Diglycol Dimaleate Yes No
Propanediol Yes No
Euterpe Oleracea Fruit Extract Yes No
Punica Granatum Extract Yes No
Rosmarinus Officinalis (Rosemary) Leaf Extract Yes No
Musa Sapientum (Banana) Fruit Extract Yes No
Origanum Vulgare Leaf Extract Yes No
Marinda Citrifolia Fruit Extract Yes No
Arctium Lappa Root Extract Yes No
Fragrance (Parfum) Yes Yes
Cocamidopropylamine Oxide Yes No
Disodium Laureth Sulfosuccinate Yes No
Panthenol Yes No
Glycol Distearate Yes No
Sodium Cocoyl Glutamate Yes No
Methyl Gluceth-20 Yes No
Acrylates Copolymer Yes No
Prunus Armeniaca (Apricot) Kernel Oil Yes No
Pseudozyma Epicola/Argania Spinosa Kernel Oil Ferment Filtrate Yes No
Pseudozyma Epicola/Camellia Sinensis Seed Oil Ferment Extract Filtrate Yes No
PEG-120 Methyl Glucose Dioleate Yes No
Amodimethicone Yes No
Sodium Lauryl Sulfoacetate Yes No
Guar Hydroxypropyltrimonium Chloride Yes No
Polyquaternium-10 Yes No
Divinyldimethicone/Dimethicone Copolymer Yes No
Polyquaternium-11 Yes No
Trisodium Ethylenediamine Disuccinate Yes No
C11-15 Pareth-7 Yes No
Laureth-9 Yes No
Glycerin Yes No
Trideceth-12 Yes No
Hexyl Cinnamal Yes Yes
Limonene Yes No
C12-13 Pareth-23 Yes No
C12-13 Pareth-3 Yes No
Hydrolyzed Vegetable Protein PG-Propyl Silanetriol Yes No
Acetic Acid Yes No
Citral Yes No
Benzoic Acid Yes No
Tetrasodium EDTA Yes No
Pentasodium Triphosphate Yes No
Sodium Polyacrylate Yes No
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate Yes No
Disodium EDTA Yes No
Sodium Benzoate Yes No
Potassium Sorbate Yes No
Phenoxyethanol Yes Yes
Chlorphenesin Yes No
Ethylhexylglycerin Yes No
Quaternium-95 Yes No
PEG-8 Yes No
PEG-8/SMDI Copolymer Yes No
Palmitoyl Myristyl Serinate Yes No
Citric Acid Yes No
Sodium Hyaluronate Yes No
Tocopherol Yes No
Biotin Yes No
Helianthus Annuus (Sunflower) Seed Extract Yes No
Helianthus Annuus (Sunflower) Seed Oil Yes No

Effectiveness: Repairing Broken Disulfide Bonds

Effectiveness: Repairing Broken Disulfide Bonds

How Olaplex Works

Olaplex works by rebuilding broken disulfide bonds in the hair. These bonds are responsible for the hair’s strength and elasticity, and they can be damaged by chemical treatments and heat styling. By repairing these bonds, Olaplex restores the hair’s integrity and prevents future damage.

The Science Behind K18

K18’s approach to repairing hair involves reconnecting polypeptide chains. These chains are essential for the hair’s structure and strength. By strengthening these chains, K18 restores the hair from the inside out, resulting in healthier and more resilient strands.

Usage and Application

Usage And Application

Olaplex No. 3 Hair Repair Perfector

Olaplex No. 3 Hair Perfector is a weekly pre-shampoo treatment. It is applied to damp hair, left on for a specified amount of time, and then rinsed out before shampooing and conditioning as usual. This treatment is known for its ease of use and compatibility with any haircare routine.

K18 Leave-In Molecular Repair Hair Mask

K18’s hair mask is a leave-in treatment that can be used on damp or dry hair. A small amount of the mask is applied to the hair and evenly distributed from root to tip. The mask does not require rinsing and can be left in for continuous repair and protection. This convenient application method makes it easy to incorporate into your haircare routine.

Results: Our Six-Month Review

Results: Our Six-Month Review

Experience with Olaplex

After using Olaplex for six months, we found that it delivered on its promises. Our hair felt stronger, looked healthier, and showed noticeable improvement in texture and shine. Olaplex’s Bond Building Technology™ proved to be effective in repairing and preventing damage, making it a reliable choice for hair repair.

Impressive Results with K18

During our six-month review, we also tried the K18 hair mask and were impressed with the results. The mask provided immediate and noticeable repair to our damaged hair. It was easy to incorporate into our haircare routine, and a little went a long way. While the K18 mask is more expensive than Olaplex, its effectiveness and efficiency make it a worthy investment.

Customer Reviews and Feedback

Both K18 and Olaplex have garnered positive reviews from customers. Users have reported significant improvements in the health and appearance of their hair after using these treatments. Many have praised Olaplex for its ability to repair and strengthen damaged hair, while others have praised K18 for its immediate and long-lasting results.


Both K18 and Olaplex offer effective solutions for repairing damaged hair. Olaplex’s patented Bond Building Technology™ rebuilds broken disulfide bonds, while K18’s unique formula reconnects polypeptide chains. While Olaplex is more affordable and can be incorporated into a full haircare routine, K18 offers more immediate and noticeable results. Ultimately, the choice between the two treatments depends on individual preferences and budget. Whether you choose K18 or Olaplex, both treatments have proven to be reliable options for repairing and protecting damaged hair.

Frequently Asked Questions

1. Can I use both Olaplex and K18 hair masks together?

No, it is not recommended to use both hair masks together as they have different formulas and ingredients.

2. Are Olaplex and K18 hair masks suitable for all hair types?

Yes, both hair masks are suitable for all hair types and can be used on damaged or chemically treated hair.

3. How often should I use Olaplex No. 3 Hair Repair Perfector?

Olaplex recommends using their No. 3 Hair Repair Perfector once a week for best results.

4. Can I leave the K18 hair mask on overnight?

No, it is recommended to leave the K18 hair mask on for a maximum of 4-6 minutes before rinsing it out.

5. Does Olaplex No. 3 Hair Repair Perfector provide heat protection?

No, Olaplex No. 3 Hair Repair Perfector is specifically designed for repairing and strengthening damaged hair, it does not provide heat protection.

6. Can I use Olaplex No. 3 Hair Repair Perfector as a daily conditioner?

No, Olaplex No. 3 Hair Repair Perfector is a weekly treatment and should not be used as a daily conditioner.

7. How long does a bottle of K18 hair mask last?

The longevity of a bottle of K18 hair mask depends on the length and thickness of your hair, but a little goes a long way and a 50ml bottle can last for several applications.

8. Can I use Olaplex No. 3 Hair Repair Perfector on colored hair?

Yes, Olaplex No. 3 Hair Repair Perfector can be used on colored hair to help maintain its health and strength.

9. Does K18 hair mask have a strong scent?

K18 hair mask has a mild scent that is not overpowering and does not linger after rinsing.

10. Can I use K18 hair mask as a heat protectant?

No, K18 hair mask is not designed to be a heat protectant and it is recommended to use a separate heat protectant product before styling with heat tools.