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DAMAGE SHIELD protective conditioner
K18 Damage Shield hair product bottle on a blue background with text highlighting benefits.
Image of conditioner: protects hair from 3 types of damage for up to 3 days*, environmental aggressors, UV rays, mechanical styling
Grey curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
Red curly hair before and after results using k18.
Red curly hair before and after results using k18.
Bleach blonde hair before and after results using k18.
Image of hair strand graphic: why hair needs a shield, damage happens every day from: uv rays, mechanical styling, environmental aggressors, damage happens at every level
Image of hair strand graphic: damage protection from the inside out, outside: ceramic blend + biotech-produced polysaccharide. Inside: K18PEPTIDETM
Image of K18 routine: K18 healthy hair routines, when you need to repair damage (detox shampoo + leave-in mask, when you need to protect against daily damage (pH shampoo + conditioner)
Image of models: shield you healthiest hair against daily damage
Image of model: weightlessly soften, smooth + detangle hair without film-forming silicones or waxes that can build up over time
DAMAGE SHIELD protective conditioner 8.5oz
Mini versus full size product comparison
K18 routine guide
4.7
Rated 4.7 out of 5 stars
718 Reviews

DAMAGE SHIELD protective conditioner

Color-safe protective conditioner maintains hair health + strength
Full Size - 251 mL
£39.00
Mini Size - 53 mL
£14.00

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.

protects from damage for up to 3 days from:

  • UV rays
  • mechanical styling
  • environmental aggressors
  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.

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

  • 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.

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
4.7
Rated 4.7 out of 5 stars
718 Reviews
Color-safe protective shampoo maintains hair health + strength
Molecular repair hair oil
4.8
Rated 4.8 out of 5 stars
295 Reviews
Weightless oil that strengthens, repairs damage + reduces frizz

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.

 your protective conditioner questions, answered
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 between K18 mask days. *k18hair.co.uk/disclaimers
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.
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.
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*.
*k18hair.co.uk/disclaimers
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*.
*k18hair.co.uk/disclaimers
clinically proven protection
0
days of conditioning protection against damage from UV rays, mechanical styling + environmental
0
agreed hair didn’t feel weighed down*
0
agreed hair felt softer*
Powered by biotech-produced polysaccharide

Acts as a biomimetic shield to protect hair BEFORE daily damage occurs—preventing damage, dullness + frizz.

EXPLORE THE SCIENCE
how to use
1. Apply a small amount of DAMAGE SHIELD protective conditioner from mid-lengths to ends and build as needed.
2. Thoroughly rinse.

For best results, use after shampooing with DAMAGE SHIELD shampoo.
learn more on our blog

Trichologist Angela Onuoha explains what causes daily hair damage

 Trichologist Angela Onuoha breaks down what causes daily hair damage, and how these culprits cause hair breakage, frizz, and dull color. The soluti...

When Should I Use K18 Conditioner vs. Mask?

 Damage repair or daily protection? Here’s the guide to finding the perfect K18 healthy hair routine.

FUNdamentals 16: You can still use conditioner

 You know what's fun? When your product works. We'll be breaking down key info + recommendations to help you get the most out of K18.

FUNdamentals 09: Skipping conditioner makes me nervous

 You know what's fun? When your product works. We'll be breaking down key info + recommendations to help you get the most out of K18. 

FUNdamentals 02: Masks + conditioners vs. K18

 You know what's fun? When your product works. We'll be breaking down key info + recommendations weekly to help you get the most out of K18   We’re ...

Myth Busting 04: Conditioners

 We get it, skipping conditioner feels wrong. Especially when it’s been a post-shampoo ritual for as long as you can remember. We’re not here to cau...

Myth Busting 02: Most products are NOT optimized for hair

 Ok listen, we’ve all been there. Your hair doesn’t look or feel the way you want it to, so you add some (a ton of) product. Maybe it’s a styler to...
feel what's possible with K18
See how K18 unlocks our community's expression
4.7
Rated 4.7 out of 5 stars
Based on 718 reviews
Write a Review (Opens in a new window)
718 reviews
  • Lucila J.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD protective shampoo 251 mL
    I recommend this product
    Age 25 - 34
    Hair Concern Chemical damage, Color-care, Dryness, Split-Ends, Fragile/brittle hair
    Hair Type Curly/Coily, Medium Density, Straight/Wavy
    My Results Visible Difference, Stronger Hair, Defined Curl/Wave Pattern, Less Breakage, Soft Touchable Hair
    Rated 5 out of 5 stars
    2 days ago
    Worth it!!

    Before and after pics of me trying to do a curly perm even though I already had curly dyed hair. It completely destroyed my hair.

    I decided to cut it off and start over. It's growing back so fast and it feels so much healthier. I bought the detox shampoo, hair oil, leave in hair mask and Damage Shield shampoo/conditioner. I know it's expensive but it is worth every penny

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    2 days ago

    We're so thrilled to hear that the DAMAGE SHIELD protective shampoo along with the rest of your hair care routine is helping your hair grow back so fast and feel so much healthier after that challenging experience, Lucila! Thank you for sharing your wonderful experience with us!

  • Lucila J.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD protective conditioner 251 mL
    I recommend this product
    Age 25 - 34
    Hair Concern Chemical damage, Color-care, Dryness, Split-Ends, Fragile/brittle hair
    Hair Type Curly/Coily
    My Results Visible Difference, Stronger Hair, Defined Curl/Wave Pattern, Less Breakage
    Rated 5 out of 5 stars
    2 days ago
    Helped heal my damaged dyed/perm hair.

    Before and after pics of me trying to do a curly perm even though I already had curly dyed hair. The perm completely destroyed my hair.

    I decided to cut it off and start over. It's growing back so fast and it feels so much healthier. I bought the detox shampoo, hair oil, leave in hair mask and Damage Shield shampoo/conditioner. I know it's expensive but it is worth every penny!!

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    2 days ago

    It's amazing when you find products that truly deliver on their promise and feel worth every penny. Thank you for sharing your wonderful transformation with us!

  • Erinn
    Verified Buyer
    Reviewing
    AirWash™ dry shampoo 118 mL
    I recommend this product
    Age 45 - 54
    Hair Concern Color-care, Extending time between washes, Frizz, Chemical damage
    Hair Type Medium Density, Straight/Wavy
    My Results Visible Difference, Soft Touchable Hair, Cleaner, fresher hair, Oil absorbed
    Rated 5 out of 5 stars
    1 week ago
    Hair, Refreshed

    I received my order today and couldn't wait to try AirWash! I'm on day 4 hair and it started to lift and separate into frizz on top and oily, piecey parts underneath. I have shaken well, sprayed and massaged in as directed. I am so pleased with the results! First, the fragrance is so good! I have volume restored and a more even texture throughout the head. The shine isn't dulled. There's no residual sticky feeling after application and brushing. My hair feels refreshed! I'm hoping to get 2 more days from this application.

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    1 week ago

    We love hearing how AirWash transformed your day 4 hair! It sounds like it delivered exactly what you needed - restoring volume, evening out texture, and keeping that natural shine while eliminating any sticky residue. Thank you for sharing your experience, Erinn!

  • Erika G.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD protective conditioner 251 mL
    I recommend this product
    Age 25 - 34
    Hair Concern Chemical damage, Split-Ends
    Hair Type Curly/Coily, Medium Density, Thick/Coarse
    My Results Stronger Hair, Less Breakage, Soft Touchable Hair, Shinier Hair, Visible Difference
    Rated 5 out of 5 stars
    1 month ago
    LOVE!

    The Damage Shield protective conditioner has become my favorite conditioner! My hair feels so soft, NOT tangled, and clean after! I have A LOT of THICK and BLEACHED hair so not every conditioner works for my hair. I have noticed an improvement in my hair health, shine, and shedding since the combined use of K18 products. 10/10 recommend this conditioner!

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    1 month ago

    Thank you so much for your amazing review, Erika! Your 10/10 recommendation means the world to us! 🙌

  • Michelle L.
    Verified Buyer
    Reviewing
    AirWash™ dry shampoo 118 mL
    I recommend this product
    Age 45 - 54
    Hair Concern Frizz, Fragile/brittle hair
    Hair Type Fine/Thin
    My Results Less Frizz, Oil absorbed
    Rated 5 out of 5 stars
    2 months ago
    Dry Shampoo

    Works so good! Fresh and clean scent! Love how it is a spray instead of a powder!!

    Was this helpful?
    KU Profile picture for K18Hair UK
    K18Hair UK
    2 months ago

    We're so glad you love the AirWash™ dry shampoo! It's awesome to hear that you're enjoying the fresh scent and the spray format - it really does make application so much easier than powder formulas. Thanks for your wonderful review, Michelle!

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