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DAMAGE SHIELD protective shampoo 8.5oz
Regular price $39
Regular price $0 Sale price $39
A bottle of DAMAGE SHIELD protective shampoo by K18, with a white and blue label, indicating the size of 8.5 fl oz.
DAMAGE SHIELD protective shampoo 8.5oz
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
A bottle of DAMAGE SHIELD protective shampoo by K18, with a white and blue label, indicating the size of 8.5 fl oz.
DAMAGE SHIELD protective shampoo 8.5oz
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
4.8
Rated 4.8 out of 5 stars
560 Reviews

DAMAGE SHIELD pH protective shampoo

Color-safe protective shampoo maintains hair health + strength

Size:
8.5oz
Regular price $39
Regular price $0 Sale price $39
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Color:
8.5oz

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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.

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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

    • How to use

      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.

    • More to know

      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.

    • Key benefits

      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.

    • Ingredients

      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, Hydroxycitronellal, Citrus
      Aurantium Dulcis Flower Oil, Citrus Aurantium Peel Oil, Citrus
      Limon Peel Oil, Tetramethyl Acetyloctahydronaphthalenes.

pairs well with
DAMAGE SHIELD protective conditioner
DAMAGE SHIELD protective conditioner
Leave-in molecular repair hair mask 50mL
full-size leave-in molecular repair hair mask
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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.
DAMAGE SHIELD protective shampoo 8.5oz
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
A bottle of DAMAGE SHIELD protective shampoo by K18, with a white and blue label, indicating the size of 8.5 fl oz.
DAMAGE SHIELD protective shampoo 8.5oz
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
your protective shampoo questions, answered

still have questions? visit our help center

Is the formula of the DAMAGE SHIELD pH protective shampoo different from the PEPTIDE PREP™ pH maintenance shampoo?

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.

What makes the DAMAGE SHIELD pH protective shampoo special?

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 color 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.

When do I use the DAMAGE SHIELD pH protective shampoo?

This pH-balanced formula is gentle enough to use every time you cleanse, delivering healthier hair and scalp after just one wash.

Why do I need both shampoos?

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.

smooth + shield all hair types

pH-optimized formula prevents frizz, dullness + tangles for everyone.

before afer
before
after
"...My hair dresser introduced me to this and I have been using it ever since! The visible difference this made with my hair...was absolutely breathtaking. Will not go back to another shampoo ever!"
- Hannah K.
Translation missing: en.before Translation missing: en.after
before
after
"I really like it, I was able to tint my hair again and it looks a little more thicker."
- Estefania M.
before afer
before
after
"I thought the shampoo really added to the performance of the rest of the products. I didn’t expect to see much of a difference but I really did...I have had so many people comment on how much better my hair looks."
- Michelle F.
before afer
before
after
"...It seems to be working, I do notice less damage and shedding"
- Olympia R.
clinically proven cleanse
91%
said hair looks healthier*
91%
said hair doesn’t feel weighed down*
Powered by K18PEPTIDE™

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

Explore the Science Explore the Science
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
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feel what's possible with K18

See how K18 unlocks our community's expression

4.8
Rated 4.8 out of 5 stars
Based on 560 reviews
95%would recommend these products
Reviews Summary
Customers say this shampoo transforms damaged and dry hair into softer, more manageable locks. Many reviews mention noticeable improvements in texture and manageability after just a few washes. Users with curly, straight, and color-treated hair report less frizz and improved shine. The shampoo cleanses thoroughly without stripping moisture. Several reviewers note it helps reduce tangles and makes styling easier. While most praise its effectiveness, some mention the premium price point.
Customers Talked About
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560 reviews
  • Martena G.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective shampoo
    I recommend this product
    Age 25 - 34
    Hair Concern Chemical damage, Heat damage, Color-care, Frizz, Dryness
    Hair Type Curly/Coily
    My Results Less Frizz, Less Breakage, Smoother Hair
    Rated 5 out of 5 stars
    19 minutes ago
    Great shampoo

    Must try! Amazing!

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    15 minutes ago

    We're so thrilled you're loving the Jumbo DAMAGE SHIELD protective shampoo! 💚 Thank you so much for the amazing review and for being part of the K18 community!

  • Natalie P.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective shampoo
    I recommend this product
    Age 65+
    Hair Concern Frizz, Dryness
    Hair Type Fine/Thin
    My Results Less Frizz, Visible Difference, Soft Touchable Hair
    Rated 5 out of 5 stars
    21 hours ago
    Great product

    I love this shampoo! It smells delicious and cleans gently

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    19 hours ago

    Thank you so much for your amazing 5-star review, Natalie! We're thrilled you're loving the delicious scent and gentle cleansing of our Jumbo DAMAGE SHIELD shampoo. 💙

  • Jon S.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD protective shampoo 8.5oz
    I recommend this product
    Age 55 - 64
    Hair Concern Color-care, Frizz
    Hair Type Thick/Coarse
    My Results Less Frizz, Less Breakage, Smoother Hair, Visible Difference
    Rated 5 out of 5 stars
    21 hours ago
    This is my only go to shampoo

    Makes a difference to your hair. Great product.

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    19 hours ago

    Thank you so much for your amazing 5-star review, Jon! We're thrilled that DAMAGE SHIELD is your go-to shampoo and that you're seeing such great results. Your support means everything to us! 💙

  • Argentina C.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective shampoo
    I recommend this product
    Age 35 - 44
    Hair Concern Chemical damage, Heat damage, Color-care, Split-Ends, Frizz
    Hair Type Fine/Thin, Curly/Coily, Medium Density
    My Results Less Breakage, Soft Touchable Hair, Visible Difference, Defined Curl/Wave Pattern, Less Frizz
    Rated 5 out of 5 stars
    Yesterday
    Best ever

    My dark brown curly hair gets re-touched and dyed to copper several times a year, and these have helped keep it SOFT and HEALTHY.

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Thank you so much for your amazing 5-star review! 💙 We're thrilled that Jumbo DAMAGE SHIELD is keeping your beautiful copper curls soft and healthy. Your support means everything to us! ✨

  • Amy C.
    Verified Buyer
    Reviewing
    mini DAMAGE SHIELD protective shampoo 1.8oz
    I recommend this product
    Age 55 - 64
    Hair Concern Heat damage, Split-Ends
    Hair Type Fine/Thin
    My Results Less Frizz, Smoother Hair
    Rated 5 out of 5 stars
    2 days ago
    Love it

    I love this shampoo Combined with the conditioner

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    2 days ago

    Thank you so much for your amazing 5-star review, Amy! We're thrilled you're loving the mini DAMAGE SHIELD shampoo and conditioner together. Your support means everything! 💖

*Disclaimers

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