November 2026 · checked November 7, 2026

K18 Hair promo codes & deals

32 live offers, 18 codes, best code 15% off.

10%OFF

Best right nowCode

10% Off at K18 Hair with Promo Code

2 shoppers used

Terms & details

Score up to 10% off with this K18 Hair promo code applied at checkout.

SALE

Sale

Leave-In Molecular Repair Hair Mask From $29

1 shopper used

Terms & details

Shop K18's Award Winning Repair Hair Mask Now!

10%OFF

Code

10% Off Your Order with K18 Hair Coupon

1 shopper used

Terms & details

Add this coupon code at checkout and score 10% off your K18 Hair purchase.

10%OFF

Sale

10% Off Any Order With Email Sign Up

1 shopper used

DEAL

Code

Free Mini Detox Shampoo at K18 Hair with FutureIQ Serum

Terms & details

Apply this K18 Hair promo code at checkout to receive a free mini detox shampoo with your FutureIQ serum purchase.

FREESHIPPING

Free shipping

Free Shipping On Orders Over $50

1 shopper used

15%OFF

Code

Save 15% on Your Order with K18 Hair Discount Code

3 shoppers used

Terms & details

Apply this K18 Hair promo code when you checkout to receive 15% off.

SALE

Sale

Mini AirWash Dry Shampoo As Low As $24

1 shopper used

10%OFF

Code

Receive 10% Off Your Order

2 shoppers used

Terms & details

Use this K18 Hair promotional code during checkout to get 10% off your qualifying purchase.

SALE

Sale

AstroLift Reparative Volume Spray Now $46

10%OFF

Code

10% Off Your Order with Promo Code

Terms & details

Don't forget to enter this K18 Hair coupon code at checkout to receive 10% off your eligible purchase.

SALE

Sale

Best Sellers As Low As $24

10%OFF

Code

Take 10% Off Your Order w/ Coupon

Terms & details

Receive a 10% discount on your eligible purchase by simply using this K18 Hair promo code at checkout.

10%OFF

Sale

10% Off 1st Order With Email Signup

2 shoppers used

Terms & details

Get 10% off your first order by signing up with your email. This offer requires email subscription for marketing messages. Unsubscribe to stop receiving emails. Terms apply.

10%OFF

Code

Take 10% Off Your Order

Terms & details

Use this K18 Hair code to save 10% on your purchase.

FREESHIPPING

Free shippingShared by a shopperOn $50+

Free Standard Shipping On $50+ Orders

10%OFF

Code

Take 10% Off Your Order w/ Coupon

Terms & details

Receive a 10% discount on your eligible purchase by simply using this K18 Hair promo code at checkout.

$10OFF

SaleOn $50+

$10 Off $50+ Purchase

1 shopper used

Terms & details

Get $10 off your purchase of $50 or more. Offer applies to orders meeting the minimum purchase requirement. Terms and conditions apply.

10%OFF

Code

Take 10% Off Sitewide with K18 Hair Promo Code

4 shoppers used

Terms & details

Take 10% off your purchase sitewide when this promo code is applied.

$10OFF

Sale

$10 Off Purchase

1 shopper used

Terms & details

Get $10 off your purchase.

15%OFF

Code

Get 10% Off Your Purchase Using This K18 Hair Coupon

1 shopper used

Terms & details

Use this K18 Hair discount code to score up to 15% off your purchase.

FREESHIPPING

Free shippingShared by a shopperOn $50+

Free Shipping On $50+ Orders

Terms & details

Get free shipping on orders $50+.

10%OFF

Code

Take 10% Off Your Order with K18 Hair Promo Code

Terms & details

Use this discount code at checkout to save 10% on your qualifying purchase.

SALE

Sale

Join The Waitlist For Purple Shampoo

Terms & details

Join the waitlist for the upcoming TripleBright Oxidation Defense Purple Shampoo.

UP TO10%OFF

Code

Up to 10% Off Your Order w/ Promo Code

1 shopper used

Terms & details

Get up to 10% off your qualifying purchase at checkout when this K18 Hair coupon code is applied.

$10OFF

Sale

Give $10 Get $10 at K18 Hair

Terms & details

Get $10 off a friend's first order of $50 or more when you refer them, and earn $10 off your following purchase.

10%OFF

Sale

Get 10% Off Your Healthiest Hair

Terms & details

10%OFF

Code

Extra 10% Off Your Cart with a K18 Hair Promo

2 shoppers used

Terms & details

Take 10% off at K18 Hair. Use this promo code to receive discount.

10%OFF

Code

Extra 10% Off Your Cart with K18 Hair Promo Code

1 shopper used

Terms & details

Enjoy 10% off your K18 Hair purchases. Use this coupon code at checkout.

15%OFF

Code

Score 15% Off K18 Hair Purchases with Coupon

1 shopper used

Terms & details

Receive 15% off your order at K18 Hair when this discount code is used at checkout.

10%OFF

Code

Apply This K18 Hair Promo Code for 10% Off

2 shoppers used

Terms & details

Take 10% off at K18 Hair when this discount code is applied to your cart.

10%OFF

Code

10% Off Your Order with K18 Hair Coupon

2 shoppers used

Terms & details

Take 10% off your purchases with this K18 Hair discount code applied.

Recently ended

These have run out. Stores often bring them back, and an old code is sometimes still accepted.

20%OFF

Code

K18 Hair Coupon: Score 20% Off

No longer live

Terms & details

Save 20% off with coupon

SAVE20

30%OFF

Code

Get 30% off Your Purchase

No longer live

Terms & details

Score 30% off with code

UNILEVER30

Before you shop at K18 Hair

About K18 Hair

Be more confident and boost your self-esteem with K18 Hair, a merchant focused on advanced hair care products designed to restore and maintain healthy, resilient hair. Some treatments reverse visible signs of damage, so your hair becomes stronger and more resilient. This merchant uses a bioengineering approach, leveraging innovative peptide technology to repair hair at the molecular level rather than simply masking surface issues. Even better, you can run your fingers through some K18 Hair promo codes and K18 Hair discounts to save some money.

Questions shoppers ask about K18 Hair

What is the K18 Hair shipping policy?

The merchant happily offers free shipping for $50 orders or higher within the United States. Your order will ship via DHL. All orders are shipped out of the warehouse in Ohio.

All orders will be processed and shipped within two to three business days after your order is placed. Our business hours are Monday through Friday from 9 a.m. to 5 p.m. PT. If you place an order on a Friday, your order will ship by Tuesday the following week, given Monday is not a holiday.

How do returns work?

If for any reason you are unsatisfied with K18 Hair, you may request to return or replace products within six months of the date of purchase for orders. Please contact customer service to initiate a return. Please allow up to two weeks for your refund to appear on your credit card statement because each financial institution varies.

How do I apply a K18 Hair promo code?

Start your path to fuller, stronger locks for less money when using a K18 Hair coupon code:

Choose your products.
Add them to your cart.
Head to Checkout.
Enter the K18 Hair discount code in the blank.
Select the Apply button.
Wave your hair back and forth when you celebrate the money you save!

Does K18 Hair have a Buy Now Pay Later option?

Yes, with Shop Pay. You can spread your purchase amount over four installments, made biweekly, while not paying interest if you make your payments on time.