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K18 shampoo bottle on a blue background
K18 hair care product bottles in various sizes on a blue background
Jumbo DAMAGE SHIELD protective shampoo
Blue cleanser product with 'cleanse' text and branding on a blue background
infographic for pH shampoo with illustrations of hair cuticles on a blue background
K18 hair care products on a colorful background with text about healthy hair routines.
Hand holding a K18 product with clear liquid being dispensed against a blue background
K18 hair care routine guide with steps for repair and maintenance.
K18 shampoo bottle on a blue background
K18 hair care product bottles in various sizes on a blue background
Jumbo DAMAGE SHIELD protective shampoo
Blue cleanser product with 'cleanse' text and branding on a blue background
infographic for pH shampoo with illustrations of hair cuticles on a blue background
K18 hair care products on a colorful background with text about healthy hair routines.
Hand holding a K18 product with clear liquid being dispensed against a blue background
K18 hair care routine guide with steps for repair and maintenance.
4.8
Rated 4.8 out of 5 stars
529 Reviews
new

Jumbo DAMAGE SHIELD pH protective shampoo

Color-safe protective shampoo maintains hair health + strength - now in a jumbo size

Size:
16oz
Regular price $59
Regular price $0 Sale price $59
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Color:
16oz

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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

      Safe to use every time you wash.
      * Massage into hair, focusing on scalp.
      * Thoroughly rinse.
      * 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.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
Jumbo DAMAGE SHIELD protective conditioner
jumbo leave-in molecular repair hair mask
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K18 shampoo bottle on a blue background
K18 hair care product bottles in various sizes on a blue background
Jumbo DAMAGE SHIELD protective shampoo
Blue cleanser product with 'cleanse' text and branding on a blue background
infographic for pH shampoo with illustrations of hair cuticles on a blue background
K18 hair care products on a colorful background with text about healthy hair routines.
Hand holding a K18 product with clear liquid being dispensed against a blue background
K18 hair care routine guide with steps for repair and maintenance.
K18 shampoo bottle on a blue background
K18 hair care product bottles in various sizes on a blue background
Jumbo DAMAGE SHIELD protective shampoo
Blue cleanser product with 'cleanse' text and branding on a blue background
infographic for pH shampoo with illustrations of hair cuticles on a blue background
K18 hair care products on a colorful background with text about healthy hair routines.
Hand holding a K18 product with clear liquid being dispensed against a blue background
K18 hair care routine guide with steps for repair and maintenance.
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.

learn more on our blog
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See how K18 unlocks our community's expression

4.8
Rated 4.8 out of 5 stars
Based on 529 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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529 reviews
  • Mallory P.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD protective shampoo 8.5oz
    I recommend this product
    Age 35 - 44
    Hair Concern Heat damage, Extending time between washes
    Hair Type Medium Density, Straight/Wavy
    My Results Soft Touchable Hair, Less Breakage
    Rated 5 out of 5 stars
    1 hour ago
    Protection without the weight

    Shampoo and conditioner have a light clean smell and this leaves my hair protected and soft without weighing it down.

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

    Thank you so much for the 5-star review! We're thrilled to hear you love how DAMAGE SHIELD protects your hair without the weight. 💙 We truly appreciate your support! ✨

  • Caitlyn C.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective shampoo
    I recommend this product
    Age 25 - 34
    Hair Concern Color-care, Heat damage, Oily hair/scalp, Frizz, Extending time between washes
    Hair Type Medium Density
    My Results Stronger Hair, Smoother Hair, Soft Touchable Hair, Cleaner, fresher hair, Less Breakage
    Rated 4 out of 5 stars
    4 days ago
    LOVE K18

    After drying my hair from natural dirty blonde to completely dark brunette (a stylist did it don’t worry)… my hair was completely fried from the process. While I’m still growing out my damaged hair I have come to love K18! BIG fan of the deep moisture mask!!!

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

    Thank you so much for the love! 💙 We're thrilled to hear you're loving K18 and that our products are helping restore your hair! ✨

  • Alyssa L.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective shampoo
    I recommend this product
    Age 25 - 34
    Hair Concern Frizz, Dryness, Oily hair/scalp, Extending time between washes, Split-Ends
    Hair Type Thick/Coarse, Medium Density, Straight/Wavy
    My Results Less Frizz, Visible Difference, Stronger Hair, Oil absorbed, Smoother Hair
    Rated 5 out of 5 stars
    5 days ago
    The best shampoo!

    This really has saved my hair. It was dry, dull, and just ugly lol. I like that you don’t have to use much. I have long hair that goes to my lower back and its thickness is about medium I guess I would say… this bottle has lasted me almost exactly 6 months. I now only have to wash and condition one a week. It’s helped with oil on my scalp also.

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

    Thank you so much for the love! 💙 We're thrilled to hear the Jumbo DAMAGE SHIELD has transformed your hair and become such a staple in your routine! ✨

  • Maria A.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective shampoo
    I recommend this product
    Age 55 - 64
    Hair Concern Chemical damage, Color-care, Fragile/brittle hair
    Hair Type Fine/Thin
    My Results Visible Difference, Less Breakage
    Rated 5 out of 5 stars
    1 week ago
    Exelente

    Just exelent

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

    ¡Muchas gracias por tu reseña, Maria! 💙 Nos alegra muchísimo saber que te encanta nuestro Jumbo DAMAGE SHIELD protective shampoo. ¡Esperamos que sigas disfrutando! ✨

  • Stacy S.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD protective shampoo 8.5oz
    I recommend this product
    Age 45 - 54
    Hair Concern Color-care, Chemical damage
    Hair Type Curly/Coily
    My Results Less Frizz, Visible Difference, Less Breakage, Smoother Hair, Defined Curl/Wave Pattern
    Rated 5 out of 5 stars
    1 week ago
    Less shedding

    My colored hair has experienced less shedding…still moisturized. My colored curls are thriving!

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

    Thank you so much for the love! 💙 We're thrilled to hear that Damage Shield is helping reduce shedding while keeping your colored curls moisturized and thriving! ✨

*Disclaimers

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