
Highlights
- Leave-in hair treatment mask
- Rebuilds hair from the inside out
- Proven to reverse hair damage in 4 minutes
- Leave-in formula provides lasting results
MONDAY Haircare ULTIMATE MOISTURE Gift Set


Members also considered
Colgate Total Whitening Toothpaste, 6 oz., 5 pk. $13.98 Was $15.98 $0.47/oz
Instant Savings
SponsoredNow $13.98current price Now $13.98, Was $15.98$15.98$0.47/ozColgate Total Whitening Toothpaste, 6 oz., 5 pk.$2 offEnds Aug 1622394.7691 out of 5 Stars. 2239 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingMember's Mark Total Protection Incontinence Underwear for Women, Choose Size $35.68 $0.37/ea
Member's Mark Total Protection Incontinence Underwear for Women, Choose Size$35.68current price $35.68$0.37/ea55214.6068 out of 5 Stars. 5521 reviewsAvailable for ShippingShippingPantene Pro-V Ultimate Care 3-in-1 Shampoo, 38.2 fl. oz. $7.98 Was $9.98 $0.21/foz
Instant Savings
Now $7.98current price Now $7.98, Was $9.98$9.98$0.21/fozPantene Pro-V Ultimate Care 3-in-1 Shampoo, 38.2 fl. oz.$2 offEnds Aug 1622904.7725 out of 5 Stars. 2290 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingSoftsoap Antibacterial Liquid Hand Soap, 11.25 fl. oz., 4 pk. $7.48 Was $9.48 $0.17/foz
Instant Savings
Now $7.48current price Now $7.48, Was $9.48$9.48$0.17/fozSoftsoap Antibacterial Liquid Hand Soap, 11.25 fl. oz., 4 pk.$2 offEnds Aug 16Available for ShippingShippingQ-tips Cotton Swabs, 1750 ct., 3 pk. $7.34 Was $9.34 $0.00/ea
Instant Savings
Now $7.34current price Now $7.34, Was $9.34$9.34$0.00/eaQ-tips Cotton Swabs, 1750 ct., 3 pk.$2 offEnds Aug 1669234.5891 out of 5 Stars. 6923 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingDove Beauty Bar Soap, Original White, 3.75 oz., 16 ct. $18.48 $0.31/oz
Dove Beauty Bar Soap, Original White, 3.75 oz., 16 ct.$18.48current price $18.48$0.31/oz1034.7735 out of 5 Stars. 103 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingOral-B ProHealth Advanced Manual Soft Toothbrush, 8 ct. $14.97 $1.87/ea
Oral-B ProHealth Advanced Manual Soft Toothbrush, 8 ct.$14.97current price $14.97$1.87/ea5754.4887 out of 5 Stars. 575 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingCrest Complete + Scope Outlast Ultra Toothpaste, 6.3 oz., 5 pk. $11.48 $0.36/oz
$11.48current price $11.48$0.36/ozFrom $11.48Crest Complete + Scope Outlast Ultra Toothpaste, 6.3 oz., 5 pk.57284.7346 out of 5 Stars. 5728 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingAlways Anti-Bunch Xtra Protection Daily Liners, Unscented, Long, 200 ct.
Instant Savings
Members-only priceAlways Anti-Bunch Xtra Protection Daily Liners, Unscented, Long, 200 ct.$3 offEnds Aug 1633134.6351 out of 5 Stars. 3313 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingListerine Cool Mint Antiseptic Mouthwash, 50.7 fl. oz., 2 pk. $10.98 Was $12.98 $0.11/foz
Instant Savings
Now $10.98current price Now $10.98, Was $12.98$12.98$0.11/fozListerine Cool Mint Antiseptic Mouthwash, 50.7 fl. oz., 2 pk.$2 offEnds Aug 1696714.8416 out of 5 Stars. 9671 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingNeutrogena Hydro Boost 48-Hour Gel Cream Face Moisturizer, 1.7 fl. oz., 3 pk. $36.48 Was $44.48 $7.15/foz
Instant Savings
Now $36.48current price Now $36.48, Was $44.48$44.48$7.15/fozNeutrogena Hydro Boost 48-Hour Gel Cream Face Moisturizer, 1.7 fl. oz., 3 pk.$8 offEnds Aug 1646584.6486 out of 5 Stars. 4658 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingMember's Mark Total Protection Incontinence Underwear for Men, Choose Size $35.68 $0.42/ea
Member's Mark Total Protection Incontinence Underwear for Men, Choose Size$35.68current price $35.68$0.42/ea25084.5255 out of 5 Stars. 2508 reviewsAvailable for ShippingShippingCrest Pro-Health Advantage Multi-Protection Mouthwash, Smooth Mint, 33.8 fl. oz., 3 pk. $10.97 $0.11/foz
Crest Pro-Health Advantage Multi-Protection Mouthwash, Smooth Mint, 33.8 fl. oz., 3 pk.$10.97current price $10.97$0.11/foz42474.7299 out of 5 Stars. 4247 reviewsAvailable for ShippingShippingDove Beauty Bar Soap, Sensitive Skin, 3.75 oz., 16 ct. $18.48 $0.31/oz
Dove Beauty Bar Soap, Sensitive Skin, 3.75 oz., 16 ct.$18.48current price $18.48$0.31/oz80904.7253 out of 5 Stars. 8090 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingGillette Fusion5 Men's Razor Cartridges, 16 ct.
Instant Savings
Members-only priceGillette Fusion5 Men's Razor Cartridges, 16 ct.$5 offEnds Aug 1659944.6522 out of 5 Stars. 5994 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShipping
About this item
Product details
In just four minutes, the K18 Leave-in Molecular Repair Hair Mask reverses hair damage on a molecular level. K18 PEPTIDE has been proven to repair bleach and color damage, as well as chemical services and heat. It provides immediate and lasting results that restore hair strength, softness, smoothness, and bounce.
Renews Hair Strength and Elasticity
This hair mask is designed to provide smooth, bouncy hair by renewing its core strength and elasticity at the innermost layer. With its unique K18 PEPTIDE formula, this hair mask not only repairs bleach and color damage but also combats the effects of chemical services and heat exposure.
Hair Mask Starts Repairing Your Hair Immediately
The K18 Leave-in Molecular Repair Hair Mask starts repairing your hair immediately and lasts beyond your next wash, ensuring ongoing reparative results.
Suitable for All Hair Types
This hair mask is suitable for all hair types, as it works on a molecular level where all hair is the same. Whether you have straight, wavy, curly, or coily hair, the K18 Leave-in Molecular Repair Hair Mask helps to improve hair quality and texture.
Disclaimer: Sam’s Club is committed to offering quality products and services at an exceptional value. To serve this goal, these products were not purchased directly from the manufacturer or its authorized distributor but from a third-party dealer with strict controls to verify authenticity and quality. Some manufacturers limit or exclude their warranties on these products. However, these items remain fully covered by Sam’s Club’s 100% Merchandise Satisfaction Guarantee. If you are not satisfied with your purchase for any reason, return your item and we'll replace it or provide a refund.
Specifications
- Vegan
- Cruelty-free
- Color-safe
Member ratings & reviews
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Showing 1-3 of 9 reviews
bring back the larger size
love the product! it relaxes my curls with no frizz my only complain why did theytake away the larger size!!
Lives up to the hype.
I absolutely love K18. My hair has been damaged for so long and so frizzy. I decided to try K18. I didn't have much hope. I noticed a huge difference with the first use. My hair afterwards was so soft and frizz free. My 2nd use, even better! The improvement in my hair is amazing! I'll be repurchasing again. BTW, the K18 is 100% authentic!
Great product
Sam’s please bring this back!!!!!!
Other popular items in Hair Care
Shark SpeedStyle Pro Hair Dryer System $229.98
Shark SpeedStyle Pro Hair Dryer System$229.98current price $229.981304.4692 out of 5 Stars. 130 reviewsAvailable for ShippingShippingShark Glossi™ Ceramic Hot Tool, Hair Dryer, & Air Glosser $179.98
Sam's Cash Offer
$179.98current price $179.98Shark Glossi™ Ceramic Hot Tool, Hair Dryer, & Air GlosserEnds Jan 312324.6207 out of 5 Stars. 232 reviewsAvailable for ShippingShippingNIGHT Vegan Satin Assorted Scrunchies, 6 ct. $14.98 $2.50/ea
NIGHT Vegan Satin Assorted Scrunchies, 6 ct.$14.98current price $14.98$2.50/ea124.3333 out of 5 Stars. 12 reviewsAvailable for ShippingShippingR+Co Television Perfect Hair Conditioner, 8.5 fl. oz. $26.98
R+Co Television Perfect Hair Conditioner, 8.5 fl. oz.$26.98current price $26.9815 out of 5 Stars. 1 reviewsAvailable for ShippingShippingLiving Proof Restore Shampoo, Choose Size $54.98 $1.63/foz
Living Proof Restore Shampoo, Choose Size$54.98current price $54.98$1.63/fozAvailable for ShippingShippingNIGHT Satin Pillowcase & Scrunchies Gift Set, 7 pc. $18.98 Was $22.98
Instant SavingsNow $18.98current price Now $18.98, Was $22.98$22.98Options from $18.98 – $29.98NIGHT Satin Pillowcase & Scrunchies Gift Set, 7 pc.$4 offEnds Aug 17Available for ShippingShippingJohnson's Head-To-Toe Wash & Shampoo, 33.8 fl. oz.
Johnson's Head-To-Toe Wash & Shampoo, 33.8 fl. oz.Members-only price7124.5492 out of 5 Stars. 712 reviewsAvailable for ShippingShippingOGX Volume & Strength + Biotin & Collagen Shampoo, 40 fl. oz. $12.98 Was $14.98 $0.32/foz
Instant Savings
Now $12.98current price Now $12.98, Was $14.98$14.98$0.32/fozOGX Volume & Strength + Biotin & Collagen Shampoo, 40 fl. oz.$2 offEnds Aug 163314.3927 out of 5 Stars. 331 reviewsAvailable for ShippingShippingOld Spice Swagger 2-in-1 Shampoo and Conditioner, 39.9 fl. oz. $8.84 Was $10.84 $0.22/foz
Instant Savings
Now $8.84current price Now $8.84, Was $10.84$10.84$0.22/fozOld Spice Swagger 2-in-1 Shampoo and Conditioner, 39.9 fl. oz.$2 offEnds Aug 163984.701 out of 5 Stars. 398 reviewsAvailable for Pickup, Delivery or ShippingPickupDeliveryShippingOGX Volume & Strength + Biotin & Collagen Conditioner, 40 fl. oz. $12.98 Was $14.98 $0.32/foz
Instant Savings
Now $12.98current price Now $12.98, Was $14.98$14.98$0.32/fozOGX Volume & Strength + Biotin & Collagen Conditioner, 40 fl. oz.$2 offEnds Aug 161934.4093 out of 5 Stars. 193 reviewsAvailable for ShippingShippingAussie Kids Moist Shampoo, Conditioner and Detangler Kit
Aussie Kids Moist Shampoo, Conditioner and Detangler KitMembers-only price784.6923 out of 5 Stars. 78 reviewsAvailable for ShippingShippingShark FlexStyle Air Styling and Drying System
Shark FlexStyle Air Styling and Drying SystemMembers-only price14454.4754 out of 5 Stars. 1445 reviewsAvailable for ShippingShippingNatureWell Living For Good Shampoo & Conditioner, 24 fl. oz., 2 pk. $29.98 $0.62/foz
NatureWell Living For Good Shampoo & Conditioner, 24 fl. oz., 2 pk.$29.98current price $29.98$0.62/foz413.2927 out of 5 Stars. 41 reviewsAvailable for ShippingShippingGarnier Whole Blends Honey Treasures Repairing Shampoo, 40 fl. oz. $10.48 $0.26/foz
Garnier Whole Blends Honey Treasures Repairing Shampoo, 40 fl. oz.$10.48current price $10.48$0.26/foz333.375 out of 5 Stars. 33 reviewsAvailable for ShippingShippingLiving Proof Perfect hair Day Conditioner, Choose Size $54.98 $1.63/foz
Living Proof Perfect hair Day Conditioner, Choose Size$54.98current price $54.98$1.63/foz34 out of 5 Stars. 3 reviewsAvailable for ShippingShipping





