K18
K18 is the revolutionary haircare brand redefining what's possible for damaged, over-processed, and colour-treated hair. Backed by patented K18PEPTIDE™ biomimetic science and thousands of glowing reviews from salons and consumers worldwide, K18 goes far beyond traditional hair masks and treatments to deliver clinically proven, lasting repair at a molecular level.
At the heart of the brand is the K18 Leave-In Molecular Repair Mask 50ml, the cult-favourite treatment that rebuilds broken keratin chains deep within the hair shaft. Unlike surface-level conditioners or protein treatments, this breakthrough leave-in formula restores strength, softness, and elasticity to even the most compromised hair — from bleach damage and chemical relaxers to heat styling and environmental stress. The result is visibly healthier, more resilient hair in just four minutes, which is why it's widely regarded as one of the best hair repair treatments available in Australia.
Another hero product is the K18 AirWash Dry Shampoo 118ml, a weightless, non-drying formula that refreshes hair between washes without leaving powdery residue or buildup. Powered by K18's biotech-driven approach, AirWash absorbs excess oil and removes impurities while supporting scalp health — making it a standout dry shampoo for fine hair and oily scalps alike, and the perfect companion to the repair mask for a complete at-home routine.
For anyone looking to add lasting body and bounce to flat or fine hair, the K18 AstroLift Reparative Volume Spray 118ml is a lightweight volumising spray that delivers buildable fullness and lift while simultaneously repairing damage with K18's signature peptide technology — a first-of-its-kind product that combines volume and molecular repair in a single step.
Beyond its hero products, the K18 range includes the Molecular Repair Hair Oil, a weightless finishing oil designed to smooth, strengthen, and shield against heat damage up to 232°C, as well as the K18 Detox Shampoo and K18 pH Shampoo, which use peptide-powered technology to detoxify, rebalance, and prepare hair for maximum treatment absorption.
Which K18 product is right for you?
First time trying K18? Start with the Leave-In Molecular Repair Mask. It's the hero product and works on all hair types in just 4 minutes.
Need a full routine? Pair the Detox Shampoo with the Repair Mask for a deep cleanse and repair in one wash.
Fine or flat hair? The AstroLift Volume Spray gives you repair and volume at the same time.
Between washes? The AirWash Dry Shampoo refreshes without buildup.
At Oz Hair and Beauty, we're proud to be a trusted K18 stockist in Australia, offering the full range with fast shipping nationwide. Whether your hair is chemically treated, heat-damaged, bleached, or simply in need of a reset, K18 provides salon-grade molecular repair trusted by professional stylists and everyday beauty lovers across the country.
Discover K18 haircare and experience the science behind long-lasting repair, stronger strands, and real before-and-after transformations.
Frequently asked questions(5)
What makes K18 different from other hair repair treatments?
K18 uses a patented bioactive peptide called K18PEPTIDE™ that works at the molecular level to reconnect broken keratin chains (disulfide bonds) within the hair. Unlike traditional conditioners or bond-repair treatments that coat or temporarily patch the hair, K18 actually restores the inner structure of the strand — reversing damage from colour, chemical services, heat styling, and mechanical stress. Results are clinically proven and long-lasting.
How do I use the K18 Leave-In Molecular Repair Hair Mask?
After shampooing (skip conditioner), apply the mask to towel-dried hair - use one pump for fine or short hair and 2–3 pumps for thicker or longer hair. Work it through evenly, then wait 4 minutes for the peptide to absorb. After that, you can style as usual. There's no need to rinse it out. For best results on heavily damaged hair, use it for 4–6 consecutive washes to build up repair.
Is K18 suitable for all hair types?
Yes. K18 products are designed for all hair types and textures — straight, wavy, curly, and coily. Whether your hair is fine and colour-treated or thick and chemically relaxed, the K18PEPTIDE™ targets universal damage at the molecular level. The formulas are also lightweight and won't weigh hair down, so they work well even on fine or oily hair types.
