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K18

K18 Damage Shield Protective Conditioner, Protects Hair from Daily Damage, Improves Strength & Shine

  • Based on 1,587 reviews
Condition: New
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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon

Arrives Sunday, Jul 5
Order within 8 hours and 14 minutes
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Size: 8.5 Fl Oz (Pack of 1)


Features

  • Defends against damage: Conditioning protection against damage from UV rays, environmental aggressors, and daily mechanical styling for up to 3 days* *Improved results in protein condition and hair breakage in simulated 3-day UV exposure *Reduction in pollution deposits in simulated pollution exposure
  • Maintains hair health: Fortifies hairs exterior lipid barrier to make hair more resilient and resistant to damage. K18PEPTIDE replenishes protein lost during washing
  • Enhances hairs natural shine: pH-optimized formula minimizes excess cuticle swelling during washing to help keep hair smooth and maximize shine.
  • Softens, smooths, and detangles without film-forming silicones or waxes that can build up over time and weigh hair down.
  • Your daily care routine: Fortify, soften, detangle + protect hair between K18 treatment mask days

Description

Can I use the conditioner instead of the mask? The mask & conditioner serve different purposes. The K18 mask reverses damage in 4 minutes, while the K18 conditioner protects hair from daily damage for up to 3 days. We recommend using the K18 mask first, waiting 4 minutes, then using conditioner. Will the K18 conditioner cause buildup on hair? No, the K18 conditioner will not cause buildup on hair. The highly concentrated, lightweight gel formula means a little goes a long way. Use less than you typically would with a traditional conditioner, and build as needed. Will the K18 conditioner weigh hair down? No, the K18 conditioner will not weigh hair down. This highly concentrated, lightweight gel formula softens, smooths, and detangles without film-forming silicones or waxes that can build up over time. Does the K18 conditioner need to be reapplied for continued UV protection? No, you do not need to reapply the K18 conditioner for continued UV protection. This product is clinically proven to protect hair against damage from UV rays for up to 3 days. Does the K18 conditioner have SPF? No, the K18 conditioner does not have SPF. Our blend helps minimize the drying and damaging effects of UV rays on the hair's cuticle. This prevents hair from becoming rough, brittle, weak, and prone to breakage from UV damage for up to 3 days. Damage Shield Conditioner Damage Shield Shampoo Detox Shampoo Molecular Repair Oil Molecular Repair Mask AirWash Dry Shampoo AstroLift Volume Spray Visit the Store Visit the Store Visit the Store Visit the Store

Language ‏ : ‎ English


Product Dimensions ‏ : ‎ 2.5 x 2.5 x 5.5 inches; 9.6 ounces


Item model number ‏ : ‎ K18 - Damage Shield - Conditioner - 250


UPC ‏ :


Manufacturer ‏ : ‎ K18


Best Sellers Rank: #4,420 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #90 in Hair Conditioner


#90 in Hair Conditioner:


Customer Reviews: 4.5 4.5 out of 5 stars (1,587)


Item Form: Cream


Hair Type: Normal


Product Benefits: Revitalizing


Additional Features: Detangling, Nourishing


Package Type Name: Tube


Hair Conditioner Type: Standard Hair Conditioner


Unit Count: 8.5 Fluid Ounces


Number of Items: 1


Item Dimensions: 2.5 x 2.5 x 5.5 inches


Liquid Volume: 250


Item Weight: 0.6 Pounds


Size: 8.5 Fl Oz (Pack of 1)


Brand Name: K18


Age Range Description: Adult


Manufacturer: K18


UPC: 858511000701


Global Trade Identification Number: 01


Model Number: K18 - Damage Shield - Conditioner - 250


Manufacturer Part Number: K1840055


Material Features: Toxin Free


Recommended Uses For Product: Massage into hair, focusing on the scalp. Thoroughly rinse & repeat as needed. This conditioner is safe to use every time you wash


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Jul 5

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Controls frizz and gives volume
Size: 8.5 Fl Oz (Pack of 1)
Love K18 products, this leaves my hair soft and manageable. Controls frizz and give my hair volume
Reviewed in the United States on June 26, 2026 by David A Seville

  • GREAT PRODUCT
Size: 8.5 Fl Oz (Pack of 1)
I have been using several of K18 products now for several months. The difference in my hair is amazing. I also use their Detix shampoo avd their hair mask, Must haves
Reviewed in the United States on April 30, 2026 by empi

  • Game-Changer for Damaged Hair!
Size: 8.5 Fl Oz (Pack of 1)
I’ve tried so many products for my dry, color-treated hair, and K18 is one of the few that actually delivers noticeable results. After just a few uses, my hair felt softer, smoother, and much stronger. The shampoo cleanses without stripping, and the conditioner leaves my hair feeling hydrated but not weighed down. My hair also has more shine and less breakage, which is a huge win. Definitely pricey, but a little goes a long way — and the results make it worth every penny. Highly recommend for anyone dealing with damage or just wanting healthier hair! ... show more
Reviewed in the United States on June 13, 2025 by Yuni

  • Expensive But Worth It!
Size: 8.5 Fl Oz (Pack of 1)
I’ve been using this product for years before I blow dry my hair. You have to just make sure that your hair is damp and towel dried not wet or it won’t work. When you apply it, leave it on for four minutes. Don’t rub it in and then come out in four minutes and use whatever other product you want it won’t make your hair greasy but instead very glossy unhealthy looking. The price point I believe, is very high for this, but it does last for quite a few months if you use it just once a week. ... show more
Reviewed in the United States on February 11, 2026 by Karen L. Lepp

  • Good restorative hair product!
Size: 1.8 Fl Oz (Pack of 1)
It restored my mature hair with one use! Though I would suggest using it every second or third washing for fine, thin hair..haha like most restorative products. K18 has break through hair products!
Reviewed in the United States on June 11, 2026 by Laura

  • Awesome
Size: 16 Fl Oz (Pack of 1)
The best shampoo and conditioner my hair is so soft and grows evenly
Reviewed in the United States on May 6, 2026 by Sarah

  • Great for my damaged hair
Size: 16 Fl Oz (Pack of 1)
Great for my thin, damaged hair.
Reviewed in the United States on June 10, 2026 by Deleen

  • Not as conditioning as I’d hope!
Size: 16 Fl Oz (Pack of 1)
I’ve used this for 2 weeks and still don’t feel it conditions my hair enough. I Thu k its lacking moisturizer technology. My hair does not feel as soft the days following, which is a shame for the price. I will continue to use in hopes my hair adapts to it.
Reviewed in the United States on June 22, 2026 by eduardo guandique

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