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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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$39.00

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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon

Arrives Nov 4 – Nov 5
Order within 21 hours and 24 minutes

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At a glance

Condition
New
Size
8.5 Fl Oz (Pack of 1)
Model
K18 - Damage Shield - Conditioner - 250
Dimensions
2.5 x 2.5 x 5.5 in
Weight
9.6 oz
Language
English
Item Form
Cream

Features 5

  • 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.

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

Specs 24

Language English
Product Dimensions 2.5 x 2.5 x 5.5 inches; 9.6 ounces
Item model number K18 - Damage Shield - Conditioner - 250
Manufacturer K18
Item Form Cream
Hair Type Normal
Product Benefits Revitalizing
Additional Features Detangling, Nourishing

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 4 – Nov 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.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


K18 damage conditioner
Size: 8.5 Fl Oz (Pack of 1)
Play liking this conditioner. A little bit goes a long way. I’ve got really long hair and have to be somewhat mindful of value. I do have extremely bleached very long, color, treated hair, and I have to be extremely delicate with it as it will break off quite easily, and I’m trying to maintain as much length as possible. This really seems to give my hair a little extra “heft “it just feels stronger. It’s lightweight, doesn’t make my already greasy hair more greasy. It does an OK job at detangling, nothing I’m overly impressed by. It does moisturize as well generally, but I still do have to follow it up with some hair oil. Your mileage may vary, as I said, I do have extremely long color treated hair. It’s got a lovely light fragrance. I wish the fragrance did last a little bit longer, but it’s not at all a dealbreaker. Highly recommend. ... show more
Reviewed in the United States on August 27, 2026 by Amazon Customer

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

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

Great product will buy again
Size: 8.5 Fl Oz (Pack of 1)
Love K 18 products the spender shipped fast fragrance is nice product seems thin which is perfect you know all the additives aren’t in there it only takes a small amount will buy again
Reviewed in the United States on August 11, 2026 by Jami W

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

Pricey, but great product.
Size: 8.5 Fl Oz (Pack of 1)
I love, love, love K18 products!
Reviewed in the United States on August 22, 2026 by Yonna Berry

Very good product.
Size: 8.5 Fl Oz (Pack of 1)
Excellent product that repairs and protects. Indonesia's had a nice scent. Has no smell whatsoever
Reviewed in the United States on August 26, 2026 by LRS

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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