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A bottle of DAMAGE SHIELD protective shampoo by K18, with a white and blue label, indicating the size of 8.5 fl oz.
optimized pH is gentle on damaged hair, certified microbiome-friendly formula is gentle on scalp, formulated with K18PEPTIDE(TM) to maintain hair health, helps reduce frizz, and tangles + promotes shine, made for all hair types + protects color, vegan, cruelty-free + plastic net-zero
K18 healthy hair routines- treatment day routine: to repair damage daily routine: to protect against daily damage
new name same formula pH maintenance shampoo formula
cleanse for frequent everyday washing
protect against dullness, frizz + tangling
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 pH protective shampoo

Color-safe protective shampoo maintains hair health + strength

Description

A color-safe, pH-optimized shampoo with the patented K18PEPTIDE™ to effectively cleanse while maintaining hair health and protecting hair from damage. pH-optimized formula helps reduce excess swelling of the hair cuticle during washing to help prevent frizz, preserve color, and enhance shine. Scalp microbiome-friendly and gentle enough to use every time you cleanse.

  • gentle daily cleaning
  • microbiome-friendly
  • pH-optimized
  1. Safe to use every time you wash.
  2. Massage into hair, focusing on scalp.
  3. Thoroughly rinse.
  4. Repeat as needed.

For best results, follow with DAMAGE SHIELD protective conditioner.

Safe but powerful cleansing: Plant-derived surfactants deliver safe but effective high-power cleansing to break down and remove dirt + oil.

Designed for damaged hair: pH-optimized formula helps prevent excess swelling of the hair cuticle during washing - which helps maintain color, improve hair health and shine, and reduce frizz.

Gentle enough to use every time you cleanse: Gentle on hair AND scalp - pH-optimized formula mimics hair’s natural pH, to reduce cuticle swelling and maintain hair health, and preserve the scalp microbiome.

Less is more formulation delivers a superior clean without compromise:

Optimized pH cleanses hair and scalp without over-drying.

Certified microbiome-friendly formula removes dirt and oil without disrupting the scalp’s natural protective barrier.

K18PEPTIDE™ helps reduce protein loss to keep hair feeling healthy and strong.

Water (Aqua) (Eau), Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl 2-Sulfolaurate, Sodium Lauryl Sulfoacetate, sh-Oligopeptide-78, Panthenol, Glycerin, Sodium Phytate, Guar Hydroxypropyltrimonium Chloride, Disodium 2-Sulfolaurate, Caprylyl Glycol, Caprylhydroxamic Acid, Benzoic Acid, Citric Acid, Sodium Hydroxide, Sodium Chloride, Fragrance (Parfum), Limonene.

pairs well with
bestseller
full-size leave-in molecular repair hair mask
4.7
Rated 4.7 out of 5 stars
4,758 Reviews
4-minute leave-in treatment to reverse hair damage
DAMAGE SHIELD protective conditioner
4.7
Rated 4.7 out of 5 stars
718 Reviews
Color-safe protective conditioner maintains hair health + strength

Description

A color-safe, pH-optimized shampoo with the patented K18PEPTIDE™ to effectively cleanse while maintaining hair health and protecting hair from damage. pH-optimized formula helps reduce excess swelling of the hair cuticle during washing to help prevent frizz, preserve color, and enhance shine. Scalp microbiome-friendly and gentle enough to use every time you cleanse.

 your protective shampoo questions, answered
No, the formula of the DAMAGE SHIELD pH protective shampoo is not different from the PEPTIDE PREP™ pH maintenance shampoo. Just the name has changed, the formulation you know and love is the same.
The DAMAGE SHIELD pH protective shampoo delivers healthier hair and scalp after just one wash. Its optimized pH helps maintain the hair cuticle, preventing excess water from entering the hair, which can cause damage, dullness, frizz, and tangling. With this shampoo, your colour is maintained, hair feels strong, healthy, looks smooth with less frizz, and is easier to style with less tangles. This formula moisturizes hair without weighing it down, and preserves the scalp microbiome for a healthier-feeling scalp and a gentler cleanse. Coupled with the DAMAGE SHIELD protective conditioner, these formulas shield your healthiest hair from daily damage.
This pH-balanced formula is gentle enough to use every time you cleanse, delivering healthier hair and scalp after just one wash.
You need both shampoos to deliver the most effective clean while maintaining your hair + scalp health. Detox shampoo is engineered for less frequent heavy-duty washing, and DAMAGE SHIELD pH protective shampoo (previously pH maintenance shampoo) is engineered for frequent washing.
clinically proven cleanse
0
said hair looks healthier*
0
said hair feels smoother*
0
said hair doesn’t feel weighed down*
Powered by K18PEPTIDE™

Biomimetic peptide helps reduce protein loss to help keep hair feeling healthy and strong.

how to use
Safe to use every time you wash.

1. Massage into hair, focusing on scalp.
2. Thoroughly rinse.
3. Repeat as needed.

For best results, follow with DAMAGE SHIELD protective conditioner.
learn more on our blog
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
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

    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!!

    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.

    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!

    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!!

    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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