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K18 hair care products on a colorful background with text about hair health and volume.

K18 hair mask bottle with product features on a pink background

K18 Astrolift mini bottle with product features on a blue background

Before and after comparison of a woman's hair with a leave-in molecular repair hair mask on a purple background.

AstroLift reparative volume spray showing a before and after comparison of hair volume.

Instructions for using a K18 mask repair treatment on a colorful background

Illustration of hair structure with K18PEPTIDE® labeled on a pink and orange gradient background.

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4.7

Rated 4.7 out of 5 stars

4,870 Reviews

healthy volume minis

Name: Healthy Volume Minis
Brand: K18Hair
SKU: K18-00088.01
Price: 40.00 USD
Availability: InStock
Rating: 4.7 (4870 reviews)

Limited-edition holiday set creates strong, bouncy hair for everyone

Healthy Volume Minis $40.00

Description

Fix damage + volume loss on all hair types for fuller, healthier hair this season.

how to use

Leave-In Molecular Repair Hair Mask:
In the shower:
-Shampoo, don‘t condition.

Out of the shower:
-Using a towel, gently dry hair until damp.
-Begin with 3 pumps of K18 mask.
-Only add more as needed, up to 9 pumps. Average use is 6 pumps (this is a highly concentrated formula, so you‘ll need much less than traditional masks.)
-Apply evenly from ends to roots.
-Let sit for four minutes.
-Don‘t rinse out.
-Style as usual after the four minutes is up (fine to add heat protectant or styling product now).
-Use for the first four to six washes, then swap to maintenance mode and use as needed.

AstroLift™ reparative volume spray:

-Shake well.
-Hold bottle 4-6 inches from roots + hair.
-Spray generously throughout.
-Blow dry for added volume.

Can be applied to dry or clean, towel-dried hair, with or without heat styling. Buildable, lightweight spray can be used in between washes to amplify volume.

PRO tip:

To maximize benefits from the reparative K18PEPTIDE™, apply on clean, towel-dried hair and wait 4 minutes.

more to know

Bestselling leave-in molecular repair hair mask repairs damage from bleach + color, chemical services, and heat* in 4 minutes for strong, soft, smooth, bouncy hair.

AstroLift™ reparative volume spray reverses bounce-depleting damage for 2 days of touchable volume + bounce*. Lightweight, buildable formula weightlessly lifts all hair types—especially fine, fragile, aging, and breakage-prone hair—without a sticky, crunchy, or weighed-down feel.

*Disclaimers

key benefits

One use of leave-in molecular repair hair mask delivers:

Healthier hair in 4 minutes*
Clinically proven damage repair from bleach* + color*, chemical services*, and heat*

One use the AstroLift™ reparative volume spray delivers:

2.5x more all-over volume*
Touchable volume + bounce for up to 2 days*
Buildable*, lightweight* volume
Humidity-resistant* hold that won’t fall flat for up to 2 days*

*Disclaimers

ingredients

leave-in molecular repair hair mask
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.

AstroLift™ reparative volume spray
Water (Aqua) (Eau), Alcohol Denat., Maltodextrin/VP Copolymer, Propanediol, PVP, Polysorbate 20, Benzyl Alcohol, Ascorbic Acid, Tocopheryl Acetate, sh-Oligopeptide 78 (K18PEPTIDE™), Palmaria Palmata Extract, Arginine, Glycerin, Levulinic Acid, Hydroxyacetophenone, Glyceryl Caprylate, Polyquaternium - 10, Pentylene Glycol, Sodium Citrate, Tetrasodium Glutamate Diacetate, Phenoxyethanol, Ethylhexylglycerin, Potassium Sorbate, Citric Acid, Fragrance (Parfum)

pairs well with

PEPTIDE PREP™ detox shampoo

4.9

Rated 4.9 out of 5 stars

587 Reviews

Color-safe, non-stripping clarifying shampoo with the K18PEPTIDE™

AirWash™ dry shampoo

4.7

Rated 4.7 out of 5 stars

566 Reviews

Revolutionary dry shampoo for a fresh hair + scalp—even after your toughest workout

Description

Fix damage + volume loss on all hair types for fuller, healthier hair this season.

got questions?

Get started here

what is the K18PEPTIDE™?

Patented biomimetic peptide uniquely matches and clicks into hair's keratin structure, reconnecting damage sites at the molecular level. K18PEPTIDE™ repairs multiple types of bonds and polypeptide chains for strong, soft, smooth, bouncy hair for all.

why do I need to skip conditioner before using the K18 mask?

Conditioner leaves a film that blocks K18PEPTIDE™ 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.

if AstroLift™ repairs hair, why do I still use the leave-in mask?

Think of the mask as a damage repair treatment, and AstroLift™ as a volumizer with additional repair benefits. Using both K18 mask + AstroLift™ in your routine will deliver maximum strength for strong, bouncy hair that lasts.

is AstroLift™ activated by heat?

No, you do not need heat to activate AstroLift™. If you want additional volume, blow dry hair after application.

does AstroLift™ also repair dry hair?

Yes, AstroLift™ is effective on dry hair too. Apply on freshly dried hair, and between washes to repair + amplify volume.

do I have to wait 4 minutes for damage repair from AstroLift™?

Yes, for best repair results, wait 4 minutes after applying AstroLift™ before applying other styling products.

see it in action

powered by K18PEPTIDE™

Biomimetic peptide clicks into hair’s keratin structure—the source of core strength—for soft, shiny, bouncy results that won’t wash away.

EXPLORE THE SCIENCE

learn more on the blog

meet AstroLift™: inner repair meets outer volume

Send hair into orbit with 2 days of touchable body + bounce—powered by interdimensional biotech.

How much leave-in mask do you really need?

Find your optimal dose with this easy guide.

How AstroLift™ Delivers Sky-High Volume for Fine, Aging Hair

Weightless lift that lasts up to 2 days* while repairing bounce-depleting damage.

The Top K18 Mask FAQs

answering your most-asked questions.

How AstroLift™ Boosts Volume for Color + Chemically Treated Hair

Reverse inner bounce-deleting damage and weightlessly lift in one step.

8 Ways to Multitask While Your K18 Mask Works

Get hair like new*—and so much more—in just 4 minutes.

how does AstroLift™ volume spray work?

The exciting science behind the weightless, lasting lift all hair types are loving.

Shop Now

4.7

Rated 4.7 out of 5 stars

Based on 4,870 reviews

Reviews Summary

Customers say this hair treatment transforms damaged and processed hair, making it softer and more manageable. Many reviews mention noticeable improvements after just a few uses, particularly for those with bleached or color-treated hair. The spray version adds volume without feeling sticky or heavy. While most users report significant benefits, some with curly hair note mixed results. Common feedback highlights how it helps reduce frizz and makes hair feel smoother. Many appreciate that a small amount goes a long way, though some mention the price point is high.

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4,870 reviews

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Ashley M.
Verified Buyer
Reviewing
Full-Size Leave-In Molecular Repair Hair Mask 50mL
I recommend this product
Age 18 - 24
Hair Concern Split-Ends, Heat damage, Color-care
Hair Type Straight/Wavy
My Results Visible Difference, Less Breakage, Smoother Hair, Shinier Hair, Soft Touchable Hair
Rated 5 out of 5 stars
4 minutes ago
Fast results
Currently I’m on my 3rd use and I already notice a different my hair feels softer and healthier
Was this helpful?
ELLA R.
Verified Buyer
Reviewing
Full-Size Leave-In Molecular Repair Hair Mask 50mL
I recommend this product
Age 18 - 24
Hair Concern Chemical damage, Heat damage, Frizz, Dryness, Split-Ends
Hair Type Medium Density, Straight/Wavy
My Results Less Frizz, Visible Difference, Stronger Hair, Less Breakage, Smoother Hair
Rated 5 out of 5 stars
15 minutes ago
THIS STUFF WORKS!!
I’ve dealt with damage and breakage and this leave in mask has healed and improved my have tremendously!! It’s so sleek and smooth now!!
Was this helpful?
Kacie R.
Verified Buyer
Reviewing
Full-Size Leave-In Molecular Repair Hair Mask 50mL
I recommend this product
Age 25 - 34
Hair Concern Fragile/brittle hair, Color-care, Dryness, Split-Ends, Frizz
Hair Type Medium Density
My Results Stronger Hair, Less Breakage, Smoother Hair, Shinier Hair, Less Frizz
Rated 5 out of 5 stars
13 hours ago
Obsessed !
I'm obsessed with this stuff. It's helped my hair so much and it looks so much healthier, stronger. Shiny and beautiful! so glad I gave it a chance. I just brought it to a favorite things Christmas party to gift to some of my girlfriends and also bought my mom some for Christmas because I love it so much! My two photos one is before you and the second photo is after my fourth time using the product
Was this helpful?
claire l.
Verified Buyer
Reviewing
Full-Size Leave-In Molecular Repair Hair Mask 50mL
I recommend this product
Age 18 - 24
Hair Concern Chemical damage, Split-Ends, Oily hair/scalp
Hair Type Medium Density
My Results Bouncy Hair, Stronger Hair, Less Breakage
Rated 5 out of 5 stars
3 days ago
Favorite hair product
Helps me be able to keep my long hair while coloring it :)
Was this helpful?
Maria B.
Verified Buyer
Reviewing
Full-Size Leave-In Molecular Repair Hair Mask 50mL
I recommend this product
Age 25 - 34
Hair Concern Heat damage, Fragile/brittle hair
Hair Type Fine/Thin
My Results Bouncy Hair, Less Breakage, Stronger Hair, Cleaner, fresher hair, Visible Difference
Rated 5 out of 5 stars
1 week ago
MAGIC
I was skeptical about this product because of all of the hype it’s gotten on social media. However, after four uses my hair has completely changed. The appearance of it is super thick and it styles so well. It holds shape and volume for 2 to 3 days until I wash it again. My hair is relatively fine and I was nervous. This would be too heavy, but it’s the perfect way for even thin hair will be buying again!!
Was this helpful?
K
K18Hair
6 days ago
Thank you so much for your incredible review, Maria! We're absolutely thrilled to hear the Full-Size Leave-In Molecular Repair Hair Mask exceeded your expectations and transformed your hair in just four uses. It's amazing to know you're seeing such fantastic results with the thickness, styling, and lasting volume - especially for fine hair! We love that it's giving you 2-3 days of beautiful shape and hold without being too heavy.

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healthy volume minis

Description

Description

powered by K18PEPTIDE™

meet AstroLift™: inner repair meets outer volume

How much leave-in mask do you *really* need?

How AstroLift™ Delivers Sky-High Volume for Fine, Aging Hair

The Top K18 Mask FAQs

How AstroLift™ Boosts Volume for Color + Chemically Treated Hair

8 Ways to Multitask While Your K18 Mask Works

how does AstroLift™ volume spray work?

How much leave-in mask do you really need?