A bottle of K18 Hair Repair DAMAGE SHIELD pH Protective Shampoo (multiple sizes) with K18PEPTIDE™ is displayed against a blue background, featuring a circular label that reads "new name! same formula.

K18 shampoo bottle on a white background

K18 Damage Shield shampoo bottle on a white background

A white bottle of K18 Hair Repair DAMAGE SHIELD pH Protective Shampoo - Multiple Sizes stands upright, with text highlighting its pH-balanced, color-protective formula, PEPTIDE PREP™, and vegan ingredients.

A streak of clear shampoo on a blue background highlights text promoting K18 DAMAGE SHIELD pH Protective Shampoo by K18 Hair Repair, designed for frequent washing, microbiome support, pH balance, and powered by K18PEPTIDE™.

Two bottles of K18 Hair Repair DAMAGE SHIELD pH Protective Shampoo, 250 ml and 930 ml sizes, with a pH-balanced formula, are displayed on a yellow and green stand against a blue background.

K18 Damage Shield shampoo bottle with blue shampoo sample on a blue background

Three K18 hair care product bottles on a blue background

K18 Damage Shield shampoo bottles on a blue background with product features highlighted.

Diagram showing hair cuticle before and after using pH shampoo on a blue background

Two K18 Damage Shield shampoos on a blue and green background with text indicating a 'new name'.

K18 Hair Repair

K18 DAMAGE SHIELD Shampoo | Daily pH-Protective Clean

$59.00

Only 1 unit left

Size:

8.5 fl oz 16 fl oz 31.5 fl oz

Variant

Free shipping on orders over $95.00.

Ships within 1 business day — most same day. Shipped by me, from the studio.

K18 DAMAGE SHIELD pH Protective Shampoo

A daily-use cleansing shampoo micro-dosed with the patented K18PEPTIDE™ — effective yet non-stripping, with a pH-optimized formula that cleanses thoroughly without disrupting your color or compromising the hair fiber. Engineered as a "clean canvas" foundation for everything that follows in your routine.

Results you can expect:

Effective daily cleaning — breaks down and removes dirt and oil without stripping
pH-balanced (4.0–5.0) to protect the hair fiber and scalp environment
Color-safe, non-sensitizing, and dermatologist tested
No fillers, no coating ingredients — a less-is-more formula that doesn't compromise
Creates the optimal foundation for K18 treatments and color-treated hair to perform at their best

Wet hair thoroughly, apply a generous amount, and massage into scalp and lengths. Rinse and repeat if needed. Use daily or as often as your routine requires. Pair with the K18 DAMAGE SHIELD pH Protective Conditioner for everyday use, the K18 PEPTIDE PREP Detox Shampoo for a periodic clarifying reset, or layer with the K18 Leave-In Molecular Repair Hair Mask for deeper repair.

Pickup available at Simply Colour Hair Salon Studio by Dean Downing

Usually ready in 24 hours

K18 DAMAGE SHIELD Shampoo | Daily pH-Protective Clean

16 fl oz

Simply Colour Hair Salon Studio by Dean Downing

Pickup available, Usually ready in 24 hours

24738 State Road 54
Lutz FL 33559
United States

+18132130959

What It Does

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 excessive swelling of the hair cuticle during washing, helping 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

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, keeping hair feeling healthy and strong.

Features

Safe yet powerful cleansing — plant-derived surfactants break down and remove dirt and oil without harshness.
Designed for damaged hair — a pH-optimized formula helps prevent excessive swelling of the cuticle during washing, which maintains color, improves shine and reduces frizz.
Gentle enough for every wash — mimics hair's natural pH and preserves the scalp microbiome, so it's safe as your daily shampoo.
No fillers — nothing in the formula that isn't doing a job.

How To Use

Safe to use every time you wash.
Massage into hair, focusing on the scalp.
Thoroughly rinse.
Repeat as needed.

For best results, follow with DAMAGE SHIELD protective conditioner.

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.

Frequently Asked Questions

Is this the one I use every day?

Yes — that's what it's for. It's the everyday shampoo in the K18 family: gentle, pH-optimized, microbiome-friendly, safe every wash. PEPTIDE PREP is the occasional detox, this is the daily.

How is it different from any other gentle shampoo?

The pH is the point. It's formulated to keep the cuticle from swelling open during washing, which is what causes frizz and lets color escape. It also carries the K18 peptide, which replaces protein lost in the wash. No fillers, no stripping.

Is it color-safe?

Yes, and the pH targeting is specifically why. Less cuticle swelling means less color loss per wash.

Do I need the matching conditioner?

Not required, but they're built as a pair — the conditioner adds three-day protection against UV and heat that the shampoo alone doesn't. If you're only buying one, buy whichever your hair is more short of: cleanse or condition.

K18 DAMAGE SHIELD Shampoo | Daily pH-Protective Clean

$59.00

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K18 DAMAGE SHIELD Shampoo | Daily pH-Protective Clean

K18 DAMAGE SHIELD Shampoo | Daily pH-Protective Clean

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