K18 hair care products including bottles and a box on a pink background

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.

Three women with different hair types and colors standing together with promotional text about K18 haircare.

tilenew | color:black

4.7

Rated 4.7 out of 5 stars

4,915 Reviews

healthy volume minis

Name: Healthy Volume Minis
Brand: K18Hair
SKU: K18-00088.01
Price: 28.00 USD
Availability: InStock
Rating: 4.7 (4915 reviews)

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

Healthy Volume Minis $28.00

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

607 Reviews

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

AirWash™ dry shampoo

4.7

Rated 4.7 out of 5 stars

587 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 4,915 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.

Write a Review (Opens in a new window)

4,915 reviews

Sort

Malorie H.
Verified Buyer
Reviewing
AstroLift™ reparative volume spray 4oz
I recommend this product
Age 35 - 44
Hair Concern Dryness, Frizz, Oily hair/scalp
Hair Type Thick/Coarse, Straight/Wavy
My Results Cleaner, fresher hair, Stronger Hair, Bouncy Hair, Less Frizz
Rated 5 out of 5 stars
2 weeks ago
A staple
Absolutely LOVEEEEE. The scent and the effect. This is a must for volume and texture.
Was this helpful?
K
K18Hair
2 weeks ago
Thank you so much for your incredible review, Malorie! We're absolutely thrilled to hear that AstroLift™ has become a staple in your routine and that you're loving both the amazing scent and the volume and texture it delivers - there's no better compliment than knowing our reparative volume spray is giving you those perfect results! ❤️
Sarah M.
Verified Buyer
Reviewing
Full-Size Leave-In Molecular Repair Hair Mask 50mL
I recommend this product
Age 45 - 54
Hair Concern Heat damage, Chemical damage, Dryness, Frizz, Fragile/brittle hair
Hair Type Grey Hair, Straight/Wavy
My Results Less Frizz, Visible Difference, Defined Curl/Wave Pattern
Rated 5 out of 5 stars
2 weeks ago
Miracle worker!
I have struggled with my damaged hair and undefined curls for YEARS. I've tried every mask under the sun. K18 has worked a miracle on my hair. I'm 6 applications in and I have been able to wear my hair curly without half a ton of gel. I can't wait to see the progress in a month or 2!
Was this helpful?
K
K18Hair
1 week ago
Thank you so much for your incredible review, Sarah! We're absolutely thrilled to hear that our molecular repair technology is working miracles on your damaged hair and undefined curls - there's no better compliment than knowing you can finally wear your curls naturally without needing half a ton of gel! It's so exciting that you're already seeing such amazing results after just 6 applications, and we can't wait for you to experience even more transformation in the coming months! ❤️
Jennifer S.
Verified Buyer
Reviewing
Full-Size Leave-In Molecular Repair Hair Mask 50mL
I recommend this product
Age 45 - 54
Hair Concern Chemical damage, Fragile/brittle hair, Frizz
Hair Type Fine/Thin, Medium Density, Straight/Wavy
My Results Visible Difference, Less Frizz, Bouncy Hair, Defined Curl/Wave Pattern, Stronger Hair
Rated 5 out of 5 stars
3 weeks ago
Gives Results!
I’ve been using this product on and off for approximately one year since my hairdresser introduced me to it. It does feel incredibly expensive when I buy this tiny bottle, but it does tend to last me through many washes. This is one product that does give me noticeable results even with one use. Since I have been wearing my hair wavy curly, it seems that I am able to get better curls with using this product.
Was this helpful?
K
K18Hair
2 weeks ago
Thank you so much for your incredible review, Jennifer! We're absolutely thrilled to hear that the Full-Size Leave-In Molecular Repair Hair Mask has been giving you those noticeable results from the very first use! It's amazing how this molecular repair technology not only transforms your hair but also enhances your beautiful wavy curls - there's nothing better than knowing you're getting that perfect curl definition along with all the repair benefits! ❤️
Sabrina L.
Verified Buyer
Reviewing
Full-Size Leave-In Molecular Repair Hair Mask 50mL
I recommend this product
Age 25 - 34
Hair Concern Heat damage, Chemical damage, Split-Ends
Hair Type Medium Density
My Results Less Breakage, Stronger Hair, Visible Difference
Rated 5 out of 5 stars
4 weeks ago
ABSOLUTELY OBSESSED
After the worst year possible for my hair, I was begging for something new that would work. I started seeing a new hair dresser who recommended the K18 leave in product. I just came up on 1 year of using it and my transformation is absolutely insane to me. I thought I would never get my hair back but happy to say I love it and feel so confident in it now.
Was this helpful?
K
K18Hair
2 weeks ago
Thank you so much for your incredible review, Sabrina! We're absolutely thrilled to hear how the Leave-In Molecular Repair Hair Mask has completely transformed your hair over this past year - it's truly amazing how our molecular repair technology can work such magic after what sounds like a really challenging time for your hair, and we're so happy that your hairdresser recommended K18 and that you're now feeling so confident and loving your hair again!
Jamie C.
Verified Buyer
Reviewing
Full-Size Leave-In Molecular Repair Hair Mask 50mL
I recommend this product
Age 35 - 44
Hair Concern Chemical damage, Color-care, Dryness, Split-Ends
Hair Type Medium Density
My Results Stronger Hair
Rated 5 out of 5 stars
1 month ago
Hair Makeover
I don’t know what I’d do without this product. It has changed my hair from thin and dry to moist and healthy! I notice when I don’t use it my hair begins to fall out, the only downside is the product doesn’t meet clean ingredient requirements, I usually only buy items that do , but I make the sacrifice because my hair is dead without it.
Was this helpful?
K
K18Hair
2 weeks ago
Thank you so much for your incredible review, Jamie! We're absolutely thrilled to hear that the Full-Size Leave-In Molecular Repair Hair Mask has given you such a complete hair makeover - transforming your hair from thin and dry to moist and healthy is exactly what this powerful molecular repair technology is designed to do! It's amazing how you can actually feel the difference when you don't use it, which really shows how effectively it's working to repair and strengthen your hair at the molecular level! ❤️

Looks like you're visiting from the UK, you're about to be redirected to our UK site

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?