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4.8

Rated 4.8 out of 5 stars

463 Reviews

Jumbo DAMAGE SHIELD pH protective shampoo

Name: Jumbo DAMAGE SHIELD protective shampoo
Brand: K18Hair
SKU: K18-40126
Price: 59.00 USD
Availability: InStock
Rating: 4.8 (463 reviews)

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

Jumbo DAMAGE SHIELD protective shampoo $59.00

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.

pairs well with

jumbo leave-in molecular repair hair mask

4.7

Rated 4.7 out of 5 stars

8,670 Reviews

4-minute leave-in treatment to reverse hair damage - now in an exclusive jumbo size

Jumbo DAMAGE SHIELD protective conditioner

4.8

Rated 4.8 out of 5 stars

525 Reviews

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

Description

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

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.

before

after

"I really like it, I was able to tint my hair again and it looks a little more thicker."
- Estefania M.

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

after

"...It seems to be working, I do notice less damage and shedding"
- Olympia R.

clinically proven cleanse

said hair looks healthier*

said hair feels smoother*

said hair doesn’t feel weighed down*

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

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

Trichologist Angela Onuoha explains what causes daily hair damage

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Your guide to the perfect cleanse on wash day.

FUNdamentals 23: Your Shampoo Questions, Answered.

You know what's FUN-damental? When your product works. We'll be breaking down key info + recommendations to help you get the most out of K18. A f...

FUNdamentals 21: Our shampoos are color-safe, here’s how...

You know what's fun? When your product works. We'll be breaking down key info + recommendations to help you get the most out of K18. That fresh-o...

FUNdamentals 20: Which shampoo do I use?

You know what's fun? When your product works. We'll be breaking down key info + recommendations to help you get the most out of K18. Your hair go...

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 463 reviews

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.

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463 reviews

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Mrs. L.
Reviewing
mini DAMAGE SHIELD protective shampoo 1.8oz
I recommend this product
Age 25 - 34
Hair Concern Chemical damage, Fragile/brittle hair, Split-Ends
Hair Type Fine/Thin
My Results Less Breakage
Rated 5 out of 5 stars
1 week ago
Mini
I purchased the mini size because it’s the first time I’m using this brand, and I wanted to see how well it worked for my hair before committing to a regular sized bottle.
Because my hair is fine and on the shorter side, I’m able to get multiple uses from this product.
And it smells amazing!
I recommend it
Was this helpful?
K
K18Hair
6 days ago
Thank you so much for your incredible review, Mrs.! We're absolutely thrilled to hear that our mini DAMAGE SHIELD protective shampoo is working so beautifully for your fine hair and that you're getting multiple uses from the travel size - there's no better compliment than knowing our protective formula smells amazing and is delivering such great results that you'd recommend it to others! ❤️
Mrs. L.
Reviewing
mini DAMAGE SHIELD protective shampoo 1.8oz
I recommend this product
Age 25 - 34
Hair Concern Chemical damage, Fragile/brittle hair, Dryness
Hair Type Fine/Thin
My Results Stronger Hair
Rated 5 out of 5 stars
1 week ago
Mini Shampoo
I purchased the mini just to see how it will work on my hair. I have relaxed, fine, brittle hair. This size is perfect for me. And it’s small enough to be TSA approved!
I also enjoyed the marketing on the inside of the box!
Was this helpful?
K
K18Hair
6 days ago
Thank you so much for your incredible review, Mrs.! We're absolutely thrilled to hear that our mini DAMAGE SHIELD protective shampoo is the perfect size for you to try on your relaxed, fine hair - and we love that you're already thinking ahead for travel with that TSA-approved convenience! There's no better compliment than knowing you enjoyed our special packaging details too! ❤️
Linda G.
Verified Buyer
Reviewing
DAMAGE SHIELD protective shampoo 8.5oz
I recommend this product
Age 55 - 64
Hair Concern Chemical damage, Heat damage, Dryness, Frizz, Split-Ends
Hair Type Thick/Coarse, Grey Hair, Curly/Coily
My Results Less Frizz, Soft Touchable Hair, Visible Difference, Cleaner, fresher hair
Rated 5 out of 5 stars
2 months ago
K18 shampoo damage
This is a great product. I love it and I can feel my hair healthier.
Was this helpful?
K
K18Hair
1 month ago
Thank you so much for your wonderful review, Linda! We're absolutely thrilled to hear that you're loving the DAMAGE SHIELD protective shampoo and can feel the difference it's making in your hair's health - it's amazing how this protective formula can work to shield your hair from damage while keeping it feeling healthier and stronger with every wash!
Britteny B.
Verified Buyer
Reviewing
DAMAGE SHIELD protective shampoo 8.5oz
I recommend this product
Age 18 - 24
Hair Concern Chemical damage
Hair Type Curly/Coily
My Results Less Frizz
Rated 5 out of 5 stars
2 months ago
loved it
worked rlly well
Was this helpful?
K
K18Hair
1 month ago
Thank you so much for your wonderful review, Britteny! We're thrilled to hear that the Damage Shield protective shampoo worked really well for you - it's amazing how effectively this protective formula can cleanse and care for your hair!
Lucila J.
Verified Buyer
Reviewing
DAMAGE SHIELD protective shampoo 8.5oz
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
3 months 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
Was this helpful?
K
K18Hair
3 months 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!

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Jumbo DAMAGE SHIELD pH protective shampoo

Description

Description

Trichologist Angela Onuoha explains what causes daily hair damage

FUNdamentals 38: Wait, what shampoo should I use?

FUNdamentals 23: Your Shampoo Questions, Answered.

FUNdamentals 21: Our shampoos are color-safe, here’s how...

FUNdamentals 20: Which shampoo do I use?