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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
535 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
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
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.

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See how K18 unlocks our community's expression

4.8
Rated 4.8 out of 5 stars
Based on 535 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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535 reviews
  • Mirna E.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective shampoo
    I recommend this product
    Age 35 - 44
    Hair Concern Chemical damage, Fragile/brittle hair
    Hair Type Fine/Thin
    My Results Stronger Hair, Soft Touchable Hair, Visible Difference, Less Breakage
    Rated 5 out of 5 stars
    2 hours ago
    Work great

    In combination with the other products works very well

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    1 hour ago

    Thank you so much for the 5-star review, Mirna! 💙 We're thrilled to hear that Jumbo DAMAGE SHIELD is working great as part of your routine! ✨

  • Bayan D.
    Verified Buyer
    Reviewing
    mini DAMAGE SHIELD protective shampoo 1.8oz
    I recommend this product
    Age 35 - 44
    Hair Concern Oily hair/scalp, Extending time between washes
    Hair Type Medium Density
    My Results Shinier Hair, Soft Touchable Hair, Cleaner, fresher hair, Odor eliminated
    Rated 5 out of 5 stars
    18 hours ago
    Smooth and shiny hair

    Smooth

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

    Thank you so much for the 5-star review, Bayan! We're thrilled to hear you're loving how smooth and shiny your hair looks with mini DAMAGE SHIELD! 💙✨

  • Urmom
    Reviewing
    Jumbo DAMAGE SHIELD protective shampoo
    I recommend this product
    Rated 5 out of 5 stars
    2 days ago
    5 Stars

    Love !

    Was this helpful?
  • Valerie M.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective shampoo
    I recommend this product
    Age 45 - 54
    Hair Concern Chemical damage, Fragile/brittle hair, Dryness, Frizz, Heat damage
    Hair Type Fine/Thin
    My Results Stronger Hair, Less Breakage
    Rated 5 out of 5 stars
    2 days ago
    Hair Talk

    I bought this product because I had a salon chemically cut cut my hair. I was devastated and ashamed. My hair was coming out in clumps. I couldn’t even touch it for fear that more would come out. I bought k 18 when I heard about it immediately. I can run my comers through my hair now and the strength of my hair of coming back. Thank you K18 for restoring some hope. I have a long way ago and a lot of healing when concerning trust and what happened to me but you have helped me to love who I see in the mirror again.

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

    Thank you so much for sharing your story, Valerie. 💙 We're honored that K18 has helped you feel confident again. Your strength means everything to us. ✨

  • Priya C.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD protective shampoo 8.5oz
    I recommend this product
    Age 45 - 54
    Hair Concern Oily hair/scalp
    Hair Type Fine/Thin
    My Results Smoother Hair
    Rated 5 out of 5 stars
    3 days ago
    Shampoo

    Good for oily hair

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

    Thank you so much for the 5-star review, Priya! We're thrilled to hear you love our DAMAGE SHIELD protective shampoo! 💙 We truly appreciate your support! ✨

*Disclaimers

10