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DAMAGE SHIELD protective conditioner

Smoothing conditioner detangles + protects from daily damage
Rated 4.6 out of 5
Based on 61 reviews

A nourishing, protective conditioner that helps shield hair from daily damage to help maintain hair health and improve smoothness and shine. Engineered to weightlessly soften and detangle while the K18PEPTIDE™ helps replenish hair during washing.

protects from damage for up to 3 days from:

  • UV rays
  • mechanical styling
  • environmental aggressors

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more to know

Clinically proven to provide conditioning protection against damage from UV rays, mechanical styling, and environmental aggressors for up to 3 days*. Fortifies, softens, and detangles hair.

  • Defends against damage: Conditioning protection against damage from UV rays, environmental aggressors, and daily mechanical styling for up to 3 days
  • Maintains hair health: Fortifies hair’s exterior lipid barriers to make hair more resilient and resistant to damage. K18PEPTIDE™ replenishes protein lost during washing.
  • Enhances hair’s 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.

*Disclaimers

key benefits

  • Biotech-Produced Polysaccharide acts as a biomimetic shield to protect hair against pollution and environmental aggressors
  • Fortifying Ceramide Blend seals damage sites in the hair cuticle—smoothing and protecting hair from further damage
  • K18PEPTIDE™ replenishes protein lost during washing

how to use

For your services
Can be used for added smoothness, softness + detangling after the K18 PRO molecular repair hair mask.

  1. Shampoo, do not condition.
  2. Towel-dry thoroughly.
  3. Apply 1-3 pumps of the PRO molecular repair hair mask.
  4. Wait 4 minutes. Do not rinse out.
  5. Apply a small amount of DAMAGE SHIELD protective conditioner from mid-lengths to ends. Build as needed.
  6. Rinse thoroughly.
  7. You do not need to re-apply the PRO molecular repair hair mask.

For client use

  1. Apply a small amount of DAMAGE SHIELD protective conditioner from mid-lengths to ends and build as needed.
  2. Rinse thoroughly.
  3. For best results, use after shampooing with DAMAGE SHIELD shampoo.

ingredients

Water (Aqua) (Eau), Isopropyl Palmitate, Stearyl Alcohol, Propanediol, Isopentyldiol, Behentrimonium Chloride, Tocopherol, Tocopheryl Acetate, sh-Oligopeptide-78, Alteromonas Ferment Extract, Prunus Amygdalus Dulcis (Sweet Almond) Oil, Simmondsia Chinensis (Jojoba) Seed Oil, Phospholipids, Jojoba Esters, Calcium Gluconate, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Ceramide NP, Phytosteryl/Isostearyl/Cetyl/Stearyl/Behenyl Dimer Dilinoleate, Polyquaternium-16, Stearalkonium Chloride, Isopropyl Alcohol, Butylene Glycol, Gluconolactone, Phenoxyethanol, Sodium Benzoate, Citric Acid, Sodium Hydroxide, Fragrance (Parfum), Hydroxycitronellal.

pairs well with

DAMAGE SHIELD pH protective shampoo

Rated 4.6 out of 5
Based on 207 reviews
Back bar size of our color-safe, protective shampoo to maintain hair health + strength View DAMAGE SHIELD protective shampoo 31.5oz (WHOLESALE) product Log In / REGISTER

molecular repair hair oil

Rated 4.8 out of 5
Based on 243 reviews
Weightless oil that strengthens, repairs damage + reduces frizz View Molecular Repair Hair Oil (WHOLESALE) product Log In / REGISTER

Description

A nourishing, protective conditioner that helps shield hair from daily damage to help maintain hair health and improve smoothness and shine. Engineered to weightlessly soften and detangle while the K18PEPTIDE™ helps replenish hair during washing.

have questions?

Get started here

Can I use the conditioner instead of the mask? 

The mask and conditioner serve two 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 for additional softening and detangling benefits in the salon, or at home between K18 mask days. *Disclaimers

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*. *Disclaimers

Does the K18 conditioner have SPF?

No, the K18 conditioner does not have SPF. The biotech-produced polysaccharide and fortifying ceramide blend help 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*. *Disclaimers

3-day damage protection, powered by biotech

why hair needs a shield

Damage happens every day from UV rays, mechanical styling, and environmental aggressors, weakening, dulling, and causing frizz on all hair types.

how the shield works

Protect hair BEFORE daily damage occurs. Inspired by nature’s resilience to harsh environments, our biotech-produced polysaccharide delivers 3-day conditioning protection without reapplying.

expert-approved protection

Trichologist Angela Onuoha breaks down how common hair aggressors damage hair, and how DAMAGE SHIELD protects hair between K18 mask days. 

PRO to PRO

See how PRO stylists are protecting hair + educating clients on DAMAGE SHIELD.

Learn how dimensional color specialist Tabitha Dueñas detangles with DAMAGE SHIELD in a lightening service.
PRO stylists Tabitha Dueñas + Emily Chen share how they chat about DAMAGE SHIELD with every client.
See how natural/curly hair and color specialist Marcel Henriquez smooths, softens and detangles curly + coily hair in the salon—without weighing hair down.

want to learn more?

Explore DAMAGE SHIELD tips, tricks, and science deep dives on the blog.

reviews

average rating 4.6 out of 5
Based on 61 reviews
  • 5 Stars
    48 Reviews
  • 4 Stars
    8 Reviews
  • 3 Stars
    3 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    2 Reviews
92% of reviewers would recommend this product to a friend
Customer photos and videos
61 Reviews
Reviewed by Kelly A. P.
Verified Buyer
I recommend this product
Age
65+
Hair Concern
  • Chemical damage
  • Heat damage
  • Split-Ends
Hair Type
  • Medium Density
My Results
  • Less Frizz
  • Less Breakage
  • Smoother Hair
  • Shinier Hair
  • Stronger Hair
Rated 5 out of 5
Review posted

Undecided

It smells nice and is easy to put into my hair, but haven’t really used it long enough to see much difference than the oleplex shampoo & conditioner I was previously using🤷‍♀️

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K18Hair PRO

We appreciate your review!

Reviewed by Amanda S.
Verified Buyer
I recommend this product
Age
45 - 54
Hair Concern
  • Frizz
  • Heat damage
  • Dryness
  • Split-Ends
Hair Type
  • Straight/Wavy
  • Medium Density
My Results
  • Less Frizz
  • Visible Difference
  • Less Breakage
  • Smoother Hair
Rated 5 out of 5
Review posted

Love It

Makes my hair less frizzy and a lot more managable

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K18Hair PRO

Thank you for your review Amanda!

Reviewed by Cheri S.
Verified Buyer
I recommend this product
Age
45 - 54
Hair Concern
  • Chemical damage
  • Heat damage
  • Color-care
  • Frizz
  • Split-Ends
Hair Type
  • Straight/Wavy
  • Medium Density
My Results
  • Less Frizz
  • Visible Difference
  • Soft Touchable Hair
  • Stronger Hair
  • Shinier Hair
Rated 5 out of 5
Review posted

Sold on K18!

I just did a review shampoo as well. The shampoo and conditioner combo has really transformed my hair. The color maintenance is longer and my hair just feels amazing.

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K18Hair PRO

We love the color care! Thank you for your 5 star review!

Reviewed by Katie S.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Chemical damage
  • Fragile/brittle hair
  • Frizz
  • Color-care
  • Split-Ends
Hair Type
  • Fine/Thin
  • Medium Density
My Results
  • Less Frizz
  • Stronger Hair
  • Visible Difference
  • Less Breakage
  • Soft Touchable Hair
Rated 5 out of 5
Review posted

LOVE!!

I have fine hair that is highlighted, my hair is healthier than ever since I started using K18, this shampoo and conditioner has made my hair feel better and be even more manageable. The shampoo cleans well, a little bit goes a long way, and the conditioner doesn’t weigh my hair down and gives the perfect amount of slip. Love Love Love!!

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K18Hair PRO

💛 Thank you for your 5 Star review Katie!

Reviewed by Elizabeth D.
Verified Reviewer
I don't recommend this product
Age
35 - 44
Hair Concern
  • Fragile/brittle hair
  • Split-Ends
  • Color-care
  • Frizz
  • Chemical damage
Hair Type
  • Fine/Thin
  • Straight/Wavy
Rated 1 out of 5
Review posted

Let down

I really wanted to love this line. It does make sections of my hair look phenomenal. However, as a fine hair girl my hair tangles horribly. The fact that there's not a detangler to pair with this is a no-go for me. I had substantial breakage from the wash, tangle, and brushing cycle. In short: it work-ish, but isn't for my hair type until a compatible detangler is developed.

For those who may have additional concerns about tangling issue... Yes, I brush gently from the ends up. No, other detanglers don't work with this line. They slick over the product coating of K18 and make my fine/thin hair look very greasy and stringy.

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K18Hair PRO

We are sorry to hear you did not love the damage shield conditioner.

recommended products

DAMAGE SHIELD pH protective shampoo
Rated 4.6 out of 5
Based on 207 reviews
Back bar size of our color-safe, protective shampoo to maintain hair health + strength
View DAMAGE SHIELD protective shampoo 31.5oz (WHOLESALE) product
Log In / REGISTER Find a Distributor
molecular repair hair oil
Rated 4.8 out of 5
Based on 243 reviews
Weightless oil that strengthens, repairs damage + reduces frizz
View DAMAGE SHIELD protective shampoo 31.5oz (WHOLESALE) product
Log In / REGISTER Find a Distributor
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