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SURGEON GENERAL'S WARNING: Smoking Causes Lung Cancer, Heart Disease, Emphysema, And May Complicate Pregnancy.

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Limited time! Get a $50 statement credit when you open an account & use it to make $30 in eligible Sam’s Club purchases within 30 days.¹

¹Offer subject to credit approval. During the offer period, new accounts that qualify will earn a $50 statement credit instead of a $30 statement credit that you may see otherwise advertised. To qualify, you must (i) apply and be approved for a Sam’s Club credit card account between May 14–June 3, 2026 and (ii) use your new account to make Sam’s Club purchases totaling $30 or more (excluding cash advances, gift card sales, alcohol, tobacco and pharmacy purchases) within 30 days of date of account opening. When you open an account online or with your mobile device, purchases cannot be made at in-club registers until the physical card is received. Your physical card should arrive in 7–10 business days from date of account opening. A $50 credit will post to the account within 90 days after the qualifying purchases are made. Offer is valid for newly opened accounts only and each account is eligible for only one $50 offer, in lieu of, and not in addition to, any advertised $30 offer.

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K18 Professional Molecular Repair Hair Mask, 5 fl. oz.

K18 Professional Molecular Repair Hair Mask is for use after chemical services and as a treatment for damaged hair. It reverses hair damage and restores strength for smooth, soft, bouncy hair. 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.

Brand

Product Net Content UOM

<ul> <li>Leave-in hair treatment mask</li> <li>K18 Peptide is clinically proven to reverse hair damage in four minutes</li> <li>Repairs damage from heat, bleach, and chemicals</li> <li>Lightweight conditioning keeps hair smooth and soft</li> </ul>

Specifications

title_shipToHome_not_available

<ul>
<li>Leave-in hair treatment mask
<li>K18 Peptide is clinically proven to reverse hair damage in four minutes
<li>Repairs damage from heat, bleach, and chemicals
<li>Lightweight conditioning keeps hair smooth and soft
</li>
</ul>

I was mildly skeptical with this purchase because it’s such a large size with a low price. I’ve tried K18 before and it’s an absolute must for my hair, however, it’s ridiculously expensive. You will not find a better price for this anywhere else, trust me, I’ve looked. Thank you Sams Club for offering this. Please don’t stop!

Authentic, great value, extra large size

The miracle solution.  My hair was breaking off at an alarming rate.  My colorist said use this. Well what a difference.  I’ve very fine hair and have never been able to use leave in anything. However, I made an exception with this. And what a difference.  My hair isn’t breaking and it isn’t weighted down.  It’s shiny and full.

Helped my over bleached breaking hair.

I recently tried the K18 hair treatment, and I must say, it exceeded my expectations. As someone with bleached hair, finding a product that effectively repairs and restores damage can be a challenge. However, K18 proved to be a game-changer for me.

Give it a try yourself.

Love, love this product.  Works great on my naturally fine, very wavy hair.  My hair would be very fuzzy when air drying.  This product is just amazing.  Just a dime size amount and the results are unbelievable.

Miracle Product:   K18

The “professional” product is the same as the original. The price here gets you three times as much! Made my hair soft, shiny and more manageable. Better than Olaplex!

Great deal!

I will only buy k18 products through Sam's Club - you can't beat the price. I use this stuff religiously and recommend it to everyone I know - and I tell them to buy it from Sams!

Best Stuff - Best Price anywhere.

I noticed that my damaged hair it’s getting stronger and healthier, no more rubber feeling, awesome product

It really works

Appears to be the real thing! I compared my original k18 I bought from Sephora with this one and it feels to be the same 😁 such a great price

Great product

This is an amazing product at a great price. A little squirt goes a long way and it even works in Florida's heat and humidity.

The Best?

Excellent product. I have used K18 for 5 consecutive shampoos so far. I have long (past my shoulders), wavy, heavily highlighted hair.
My hair feels more managable, less frizzy and healthy :) I highly recommend.

Highly recommend! I am hooked!

I bought this product at Sam's Club 7 months ago and had no problem with it.  Loved it .   I was beginning to run out and bought another one (5oz) and it is not the same as the other bottle as far as the results of my hair.    This new bottle is not authentic.  It has to be a knock off.  I will return it .  I am not throwing out  $68

K18 Professional Molecular Repair Hair Mask, 5 fl. oz.

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Highlights

Monday DEEP MOISTURE Hair Mask Duo, 8.4 fl. oz., 2 pk.