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K18

K18 Damage Shield Protective Shampoo, Reduces Frizziness & Tangles, Maintains Hair Health

  • Based on 1,569 reviews
Condition: New
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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon
Arrives Monday, Jul 13
Order within 9 hours and 48 minutes
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Size: 8.5 Ounce (Pack of 1)


Features

  • Color-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 hairs natural pH, to reduce cuticle swelling and maintain hair health, and preserve the scalp microbiome
  • Certified microbiome-friendly formula: Removes dirt and oil without disrupting the scalps natural protective barrier
  • Formulated with K18PEPTIDE: Helps reduce protein loss to keep hair feeling healthy and strong

Description

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. 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 is engineered for frequent washing. Damage Shield Shampoo Damage Shield Conditioner Detox Shampoo Molecular Repair Mask AirWash Dry Shampoo Molecular Repair Oil AstroLift Volume Spray Visit the Store Visit the Store Visit the Store Visit the Store

Product Dimensions ‏ : ‎ 2.5 x 2.5 x 5.5 inches; 9.6 ounces


UPC ‏ : ‎


Manufacturer ‏ : ‎ K18 Hair


Best Sellers Rank: #4,528 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #138 in Hair Shampoo


#138 in Hair Shampoo:


Customer Reviews: 4.5 4.5 out of 5 stars (1,569)


Item Form: Cream


Hair Type: Normal


Scent Name: Fresh


Other Special Features of the Product: Unscented


Product Benefits: Our K18PEPTIDE™ repairs hair at a molecular level across multiple types of bonds, restoring hair health for all


Suitable Hair Color: All Hair Colors


Brand Name: K18


Age Range Description: Adult


UPC: 858511000749


Manufacturer Part Number:


Manufacturer: K18 Hair


Liquid Volume: 8.5 Fluid Ounces


Number of Items: 1


Item Weight: 0.6 Pounds


Item Dimensions: 2.5 x 2.5 x 5.5 inches


Unit Count: 8.5 Ounce


Material Type Free: Cruelty Free, Vegan


Recommended Uses For Product: Massage into hair, focusing on the scalp. Thoroughly rinse & repeat as needed. This conditioner is safe to use every time you wash


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jul 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • A great buy. Works great. Your hair will look and feel beautiful
Size: 16 Fl Oz (Pack of 1)
This product is a little pricey but very very well investment to maintain healthy hair
Reviewed in the United States on July 3, 2026 by Julian & Raquel Moralez
    • AHHHHH-MAZZZING!!!
Size: 8.5 Ounce (Pack of 1)
Amazing shampoo! First time I heard about K18 was from a new stylist - she put the K18 leave-in molecular repair hair mask on my hair after my bleach/color job and I love how it made my hair. I bought some for myself and used with my regular shampoo. Worked pretty good. Enough to buy more. Went to a new stylist and my hair got burnt up. Bad. So I tried this product and bought the K18 shampoo and WOWWWWW!!! - I can’t even believe the difference when used together! My fine, thin, very broken bleached hair looks much healthier and shinier after just 2 washes and 2 treatments with K18!! I wish I would have taken pics! I usually have to wash every day or every other day but went a whole week with using dry shampoo only once and it wasn’t dry at all. It feels and looks so much healthier! I can’t wait to try their K18 conditioner when I’m done with this treatment! (Ie: Use the treatment 4-6 times after shampooing with no conditioner then switch to conditioner and use the treatment just as needed!) I’m so glad I found this! Thank you K18!!! ... show more
Reviewed in the United States on February 4, 2026 by Jesus Loves and Saves
    • Finally Found a Shampoo That Helps Dry Hair
Size: 16 Fl Oz (Pack of 1)
I have older, dry hair and this shampoo has made a noticeable difference. My hair feels softer, looks healthier, and has much less frizz than before. It cleans well without stripping away moisture, which is hard to find. A little goes a long way, and my hair feels better after every wash. Definitely worth trying if dry, aging hair is a concern. ... show more
Reviewed in the United States on May 30, 2026 by Michael Collins
    • Great repair product
Size: 16 Fl Oz (Pack of 1)
I like automatic shipping for my order, but prefer to receive all three products that receiving all 4 items together. I will have to wait till have . Great products, love how Thank you .
Reviewed in the United States on June 8, 2026 by Andrea j Gilliland
    • It’s simply YES
Size: 8.5 Ounce (Pack of 1)
I bleach and color my hair A LOT, to the point that my naturally medium dark brown hair is a white lavender grey. Normally this would be problematic with things like drying out, frizzing, brittle, damaged hair. But people can not get over how healthy my hair is! Not just looks but feels. One wash and my hair felt clean and light. I don’t feel like I am fighting to add moisture in my hair constantly. I wouldn’t say it’s a miracle worker, I still have minor breakage but all things considered, it is nothing like what it probably should be with that much bleach! Using the shampoo and conditioner for a few months now with both the oil and mask as needed, and I gotta say I am very pleased. Yes, it is expensive. I still feel a little bit of a gut punch every time I buy it, but I only wash my hair once a week so it lasts me awhile. This will strip a little color out when you wash. For me, that’s not so problematic but I could see it being an issue for people that use heavier coloring. I find the fragrance very pleasant. ... show more
Reviewed in the United States on April 7, 2026 by Madelyn
    • Hair
Size: 8.5 Ounce (Pack of 1)
This is a good product. The fragrance is soft not strong at all. Lightweight does not leave hair greasy
Reviewed in the United States on June 29, 2026 by April Byrum
    • Works great worth the price
Size: 16 Fl Oz (Pack of 1)
Works great! Love the K18 line. I have colored fine hair.
Reviewed in the United States on June 30, 2026 by Adk_gurl
    • Great product
Size: 8.5 Ounce (Pack of 1)
This is a consistent purchase for me. I love all k18 products. They are worth the money!
Reviewed in the United States on June 30, 2026 by Molly Marroy

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