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K18

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

  • Based on 1,747 reviews
Condition: New
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As low as $9 / mo
  • – 4-month term
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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon

Arrives Sunday, Aug 23
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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

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: #5,304 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #108 in Hair Conditioner


#108 in Hair Conditioner:


Customer Reviews: 4.5 4.5 out of 5 stars (1,747)


Item Form: Cream


Hair Type: Normal


Product Benefits: Revitalizing


Additional Features: Detangling, Nourishing


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: 9.6 ounces


Size: 8.5 Fl Oz (Pack of 1)


Brand Name: K18


Age Range Description: Adult


Manufacturer: K18


UPC: 858511000701


Global Trade Identification Number: 01


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, Aug 23

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.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Works fast
Size: 8.5 Fl Oz (Pack of 1)
:This one actually does what it claims. My hair felt smoother and less brittle within the first couple of uses, not weeks later. The real proof was when I ran out and switched to something else — the difference was obvious right away, so it’s back in the rotation permanently. A little goes a long way too. ... show more
Reviewed in the United States on August 13, 2026 by Riou Lin

  • Amazing Results with K18 Repair Conditioner
Size: 8.5 Fl Oz (Pack of 1)
I absolutely love the K18 Repair Conditioner! It leaves my hair feeling incredibly soft, smooth, and healthy without weighing it down. My hair looks shinier, feels stronger, and is much easier to manage. It’s especially great for damaged or dry hair. Definitely one of my favorite hair products, and I would highly recommend it! ✨❤️ ... show more
Reviewed in the United States on August 7, 2026 by NicoleS

  • Will purchase again
Size: 1.8 Fl Oz (Pack of 1)
I’ve been using it every week and I feel my hair is much healthier and smoother! I love it and will be buying again
Reviewed in the United States on August 4, 2026 by Victoria Solon

  • SO GOOD
Size: 8.5 Fl Oz (Pack of 1)
I love K18 so much. I started out with their Air Wash and have now switched most of my hair products to K18. They work so well. My hair is so soft and silky now. I live in a very dry climate and it has been a lot of effort to figure out how to care for my hair coming from a humid climate. K18 has been a game changer. My hair feels so clean and soft and alive again. A little of this conditioner goes a long way also so even though it’s a bit pricey it lasts for a long time. ... show more
Reviewed in the United States on January 21, 2026 by Britt

  • Very nice
Size: 8.5 Fl Oz (Pack of 1)
Great conditioner I love this brand because it makes your hair feel so soft once you’re done using it. I highly recommend that you try it for yourself. It’s pretty pricey but if you get the right size it’s kinda worth the money you spend.
Reviewed in the United States on July 28, 2026 by Denise

  • K 18 conditioner
Size: 16 Fl Oz (Pack of 1)
Fantastic product! Love the larger size bottle, the fragrance is perfect, and it leaves my hair in great condition consistently
Reviewed in the United States on August 16, 2026 by Charlene E.

  • 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

  • Game Changer
Size: 16 Fl Oz (Pack of 1)
This is essential. The only one that works for me. Worth every penny!
Reviewed in the United States on July 19, 2026 by April Gunter

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