Damage Shield pH Protective Shampoo

Damage Shield pH Protective Shampoo is rated 4.6 out of 5 by 101.
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8.5 oz.
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What It Is

This color-safe, pH-optimized shampoo with the patented K18Peptide™ helps reduce excess hair cuticle swelling during washing to help prevent frizz, preserve color + enhance shine. Scalp microbiome-friendly and gentle enough to use every time you cleanse. Engineered for frequent or daily washing.

What It Does

• Cleanses while smoothing the hair surface: Effective yet safe cleansers break down and remove dirt + oil for optimal nourishment and manageability.

• Designed for daily use: pH-balanced formula doesn’t disrupt the hair fiber or scalp environment and is safe to use daily if needed.

• Creates the ideal foundation for healthy hair: This formula was engineered to create an optimal clean canvas without any fillers to coat or disrupt the hair and scalp equilibrium.

• Fortifies, softens and detangles hair while helping to protect against damage from daily mechanical styling, UV-rays, and environmental stressors, while the K18Peptide™ helps to replenish hair from damage that occurs during washing.

• Defends against damage: Shields against UV rays, environmental aggressors, and daily styling damage until your next wash (studied up to 3 days.)

• Strengthens + reduces breakage: Fortifies hair’s exterior lipid barriers to make hair more resilient and resistant to damage.

• Prevents color-fade while enhancing shine: pH-optimized formula minimizes excess cuticle swelling during washing and protects against oxidative damage, which can accelerate color loss and dull hair.

• Replenishes protein lost while cleansing: to maintain hair health and strength.

• Softens, smooths, and detangles: without film-forming silicones or waxes that can build up over time, weighing hair down.

What Else You Need to Know

• Less is more formulation delivers a superior clean without compromise.

• Optimized pH keeps the cuticle closed during washing and protects hair’s natural moisture levels for a smoothing hair result.

• Plant-derived surfactants create high foaming + cleansing power without being harsh or leaving buildup behind on hair or scalp.

• K18Peptide™ works as a protective shield to reduce protein loss that can occur during washing to keep hair feeling soft, strong, healthy and clean.

For Stylist Use

1. Use for higher frequency washing like multiple wash services or clients with less buildup.

2. Massage into hair, focusing on scalp.

3. Thoroughly rinse.

4. Repeat as needed.

 

For Client Use

1. Safe to use every time you wash.

2. Massage into hair, focusing on scalp.

3. Thoroughly rinse.

4. Repeat as needed.

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, Fragrance (Parfum), Limonene.

Purchases made in SalonCentric stores may be returned to any SalonCentric store. Purchases made through SalonCentric Customer Service, SalonCentric Business Partners, and SalonCentric.com orders Sold and Shipped by SalonCentric may be returned to a SalonCentric store; however, the return must not exceed $450 and must include the original receipt, packing slip, or invoice. For returns in-store of online orders, the refund will be credited back to the original payment method once the return has been processed. For SalonCentric.com Online Exclusive orders sold and shipped by third-party sellers, please see more details linked below for return steps.

The SalonCentric return policy does not currently apply to Kérastase & Shu Uemura purchases. Kérastase & Shu Uemura do not accept returns.

Click to see more details.

Rated 5 out of 5 by from K-18 Great for smoothing and reconstructing without weight
Date published: 2025-04-16
Rated 5 out of 5 by from Love! Best shampoo, conditioner and styler I’ve ever used. Dry shampoo is great too, works well with the other K 18 products
Date published: 2025-04-11
Rated 5 out of 5 by from Love! The combo of this shampoo with the conditioner makes my hair look and feel healthy. Love it
Date published: 2025-03-17
Rated 5 out of 5 by from One of my favorite light shampoo and conditioners. Every client has loved this products
Date published: 2025-03-11
Rated 5 out of 5 by from I Like It This is in my arsenal of products. I switch between this and a couple other products and like it a lot.
Date published: 2025-02-22
Rated 1 out of 5 by from Wouldn’t know Never received! Hate that it’s come to this but have reached out to customer service twice with no response 👍
Date published: 2025-02-14
Rated 5 out of 5 by from Theee Best Amazing for my over processed hair! It feels amazing! Along with conditioner and leave in mask! Must try for every blonde!
Date published: 2025-02-03
Rated 5 out of 5 by from K18 Shampoo Love K18 this shampoo has helped my hair so much!! My hair is in much better condition than it was prior to using. I highly recommend this product if you have dry damaged hair.
Date published: 2025-01-31
Rated 5 out of 5 by from First time Finally got my hands on the shampoo and conditioner And my first wash was magical
Date published: 2024-12-27
Rated 5 out of 5 by from Amazing Loved it best hair mask ever
Date published: 2024-12-19
Rated 5 out of 5 by from Great for all hair types I love how cleansing it is without stripping the hair too much. It gives the hair such a nice clean, soft feel
Date published: 2024-12-10
Rated 5 out of 5 by from 10/10 highly recommend I really love this shampoo, and the entire K18 line for myself and for my clients!
Date published: 2024-12-02
Rated 5 out of 5 by from I keep buying it! It's been a refreshing change and I love it! I lathers well, hair always feels clean but not dry and a little goes a long way.
Date published: 2024-10-09
Rated 5 out of 5 by from Best Shampoo Scalp feels better! Can last longer between washes
Date published: 2024-09-19
Rated 5 out of 5 by from 10/10 I've been recommended by many other hairstylist to try this and it has now replaced my olaplex that I refused to let go
Date published: 2024-09-11
Rated 2 out of 5 by from Just ok Just ok. Nothing special and it doesn’t smell great. Very bland.
Date published: 2024-09-09
Rated 1 out of 5 by from Horrible especially for bleached hair Dried my hair out worst then any shampoo/conditioner I have ever used
Date published: 2024-09-06
Rated 5 out of 5 by from LOVE! I actually had a client come in and I couldn't believe how good her hair looked/felt because she had so much bleach damage. I asked what she had been using and it was the k18 shampoo and comditioner! Went and bought some asap!
Date published: 2024-07-30
Rated 1 out of 5 by from No just No! I am appalled that there are positive reviews here. I love love LOVE the k18 repair hair mask treatment, I've been using on my 3b/3c curls with highlights for years & its holy grail. The owner of the salon I work at heard about it at a hair convention before it was offered at the salon centric in our area or anywhere else and she brought me a sample. Ive been hooked ever since. It follows, when they released the shampoo/conditioner I *needed* to try them. Both the conditioner and shampoo are, IMO, complete garbage. After using, my bleached ringlets were looking like they needed washed/reset/restyled before the very next day. The next time I got in the shower before I put any shampoo in my hair I wet it and suds were coming out of my hair. Kinda felt like I was going crazy, so even though I used half a dime size of shampoo the first time, I used a pea size this time. I could not for the life of me get this laundry detergent-esque shampoo out of my hair. Again needed to wash & restyle sooner. I gave it one more try, the next I was washing my hair I ran a bath and used my detachable shower head so I could see the bubbles go into the bath water. It took over twelve rinses to get half a pea size of this god forsaken shampoo out of my hair. It might even be worth it if it seemed to make my hair softer/healthier/stronger? Nope. Felt like I was using laundry detergent and drugstore hand lotion. I'll stick with using *any other shampoo/conditioner* and still use k18 hair mask & hair oil.
Date published: 2024-06-23
Rated 4 out of 5 by from works great, not fond of the smell The shampoo is amazing. Makes the hair feel great! Especially when used with the leave in hair mask and molecular oil. I just wish the shampoo smelled better. It kind of has sour smell to it. But the benefits that way the smell factor so I will definitely keep using it.
Date published: 2024-06-23
Rated 5 out of 5 by from The best shampoo Using this shampoo with the k18 system has enhanced my Client hair health.
Date published: 2024-06-11
Rated 5 out of 5 by from love My hair has never felt better and I change colors and use lightener often
Date published: 2024-06-08
Rated 5 out of 5 by from Mikey likes it purchased for our front desk receptionist and she loves it. Says it helps with her straight hair frizz and in turn cuts down on heat styling to tame the frizz. Also, smells lightly of grapefruit and not super overpowering.
Date published: 2024-05-23
Rated 5 out of 5 by from Leave the hair so smooth and hydrating even before using the conditioner. Love the way it hydrates my lighten hair.
Date published: 2024-05-20
Rated 5 out of 5 by from Love it! I love K18, it’s the best shampoo/conditioner combo i’ve tried, the mask is amazing too!
Date published: 2024-05-17
Rated 5 out of 5 by from this stuff is a game changer. I was skeptical of the K18 shampoo and conditioner but I now use this on EVERYBODY!! It’s amazing, especially for clients that get their hair lightened or curly hair clients.
Date published: 2024-04-19
Rated 5 out of 5 by from perfect for my blondes and vivids I use the shampoo and conditioner on all my blonding and vivid clients and they all comment on how smooth and soft their hair is after. it's a great add On to any chemical service to help protect the integrity of the hair
Date published: 2024-04-16
Rated 5 out of 5 by from perfect for any hair type I use this is salon, but my scalp has been dry lately due to the cold weather and wow this has helped with the flaking and itching, i also have extensions in and no change in the quality of hair!
Date published: 2024-04-02
Rated 5 out of 5 by from Chefs kiss This is a game changer! I haven’t had one client not love this product! It’s my go to back bar now cause it works for everyone
Date published: 2024-04-02
Rated 3 out of 5 by from expected more? it’s okay, it’s not the worst, it’s not the best. the first couple of uses i liked it a lot but then i felt like it was just your average shampoo/ conditioner combo after about a month of using it. nothing really special about it. i’ll probably just stick to using the treatment on my clients and myself.
Date published: 2024-03-02
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