K18 Leave-In Mask

Shampoo, do not condition. Towel-dry thoroughly
Apply 1-3 pumps of K18 leave-in molecular repair hair mask based on your length and density, starting at the ends and working up towards the roots
Let sit for 4 minutes. Do not rinse out
Comb, add product + style as usual. Use for 4-6 washes post-salon service, then as needed

DO clarify before K18 if you’re a heavy product user (demineralize for mineral + metal buildup)
DO apply on clean, damp hair
DO wait the full 4 minutes before combing or styling
DO add whatever styling products you love after the 4 minutes
DO use for 4-6 shampoos consecutively for progressive results
DON'T use conditioner before applying K18 Mask (you can apply after the 4 min but most find they don’t need it)
DON'T overdo it—less is more
DON'T rinse it out

Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20,sh-Oligopeptide-78 (K18PEPTIDE™), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.

The product information listed here might be subject to change. Always refer to the product packaging for the most up to date ingredient list.

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. As a result, disulfide bonds are also reconnected for reinforced strength along the length + width of hair—offering comprehensive, lasting, and progressive repair.

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*
*Disclaimers

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. Our unique blend of 3 alcohols functions to open the hair cuticle so the K18PEPTIDE™ can penetrate the innermost layer of hair, reaching the broken polypeptide chains (keratin chains).

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.

We ship a mix of Sable Boutique items and pieces from our brand friends.

Sable Boutique

Free shipping on orders over $99

$10 shipping on orders $99 and under

Selected Brand Friends

Some items ship directly from our brand friends and have their own shipping rates:

Madam Fancy Pants

• Free shipping over $100
• $8 shipping on orders $100 and under

Tap Health

• $4.50 Standard
• $10.50 Rural
  
  
  If your order includes items from both Sable Boutique and our brand friends, they may arrive separately and shipping is calculated independently for each.

At Sable Boutique, we understand the importance of using genuine, high-quality beauty products. That’s why we’re proud to be an authorised retailer for every brand we carry. When you shop with us, you can trust that your products are fresh, authentic, and sourced directly from the brands and their official representatives.

Unfortunately, counterfeit and expired beauty products are a growing concern online. Purchasing from unauthorised sellers can put you at risk of receiving ineffective — or even unsafe — items.

Here’s why Sable Boutique is your trusted destination for professional hair and beauty essentials:

• Guaranteed Authenticity: We source exclusively from official brand distributors, ensuring every product you receive is 100% genuine.
  
• Fresh Inventory: Our regular shipments mean you’re getting the latest formulations with optimal shelf life.
  
• Safe & Effective: Authentic products deliver real results — without the risks associated with counterfeit or expired cosmetics.

Shop with confidence knowing that every purchase from Sable Boutique supports your hair and skin with trusted, salon-grade quality — straight from the source.