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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
4.8
Rated 4.8 out of 5 stars
528 Reviews

DAMAGE SHIELD pH protective shampoo

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.

    • How to use
    • More to know
    • Key benefits
    • Ingredients
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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
your protective shampoo questions, answered
Is the formula of the DAMAGE SHIELD pH protective shampoo different from the PEPTIDE PREP™ pH maintenance shampoo?
What makes the DAMAGE SHIELD pH protective shampoo special?
When do I use the DAMAGE SHIELD pH protective shampoo?
Why do I need both shampoos?
clinically proven cleanse
91%
said hair looks healthier*
91%
said hair doesn’t feel weighed down*
how to use
feel what's possible with K18
4.8
Rated 4.8 out of 5 stars
Based on 528 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
528 reviews
  • 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
    2 hours 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!!!

    K Profile picture for K18Hair
    K18Hair
    1 hour 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
    Yesterday
    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.

    K Profile picture for K18Hair
    K18Hair
    23 hours 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
    2 days ago
    Exelente

    Just exelent

    K Profile picture for K18Hair
    K18Hair
    2 days 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
    4 days ago
    Less shedding

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

    K Profile picture for K18Hair
    K18Hair
    4 days 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! ✨

  • Cathleen S.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective shampoo
    I recommend this product
    Age 55 - 64
    Hair Concern Chemical damage, Frizz, Heat damage, Color-care, Dryness
    Hair Type Thick/Coarse
    My Results Less Frizz, Less Breakage, Soft Touchable Hair, Visible Difference, Smoother Hair
    Rated 5 out of 5 stars
    5 days ago
    K18 shampoo

    Excellent product line. Definitely helps my hair with less fizziness and adds softness. I’ve been using it for a couple of years. Goes well with the detox shampoo, mask and conditioner.

    K Profile picture for K18Hair
    K18Hair
    5 days ago

    Thank you so much for the love! 💙 We're thrilled to hear you've been enjoying the Jumbo DAMAGE SHIELD protective shampoo for a couple of years and love how it works with your full routine! ✨

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