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mini DAMAGE SHIELD protective conditioner 1.8oz
Image of conditioner: protects hair from damage for up to 3 days*, weightlessly detangles hair, maintains hair health for all hair types, fortifies, softens + smooths, enhancers hairs natural shine, vegan, cruelty-free + plastic net zero
Image of conditioner: protects hair from 3 types of damage for up to 3 days*, environmental aggressors, UV rays, mechanical styling
Image of hair strand graphic: why hair needs a shield, damage happens every day from: uv rays, mechanical styling, environmental aggressors, damage happens at every level
Image of hair strand graphic: damage protection from the inside out, outside: ceramic blend + biotech-produced polysaccharide. Inside: K18PEPTIDETM
Image of K18 routine: K18 healthy hair routines, when you need to repair damage (detox shampoo + leave-in mask, when you need to protect against daily damage (pH shampoo + conditioner)
Image of models: shield you healthiest hair against daily damage
Image of model: weightlessly soften, smooth + detangle hair without film-forming silicones or waxes that can build up over time
K18 routine guide
Rated 4.6 out of 5
Based on 217 reviews

mini DAMAGE SHIELD protective conditioner

Nourishing conditioner shields hair from daily damage
OR

Description

 

A nourishing, protective conditioner that helps shield hair from daily damage to help maintain hair health and improve smoothness and shine. Engineered to weightlessly soften and detangle while the K18PEPTIDE™ helps replenish hair during washing.

protects from damage for up to 3 days from:

  • UV rays
  • mechanical styling
  • environmental aggressors

Clinically proven to provide conditioning protection against damage from UV rays, mechanical styling, and environmental aggressors for up to 3 days*. Fortifies, softens, and detangles hair.

  • Defends against damage: Conditioning protection against damage from UV rays, environmental aggressors, and daily mechanical styling for up to 3 days
  • Maintains hair health: Fortifies hair’s exterior lipid barriers to make hair more resilient and resistant to damage. K18PEPTIDE™ replenishes protein lost during washing.
  • Enhances hair’s natural shine: pH-optimized formula minimizes excess cuticle swelling during washing to help keep hair smooth and maximize shine.
  • Softens, smooths, and detangles: Without film-forming silicones or waxes that can build up over time and weigh hair down.

*Disclaimers

  • Biotech-Produced Polysaccharide acts as a biomimetic shield to protect hair against pollution and environmental aggressors
  • Fortifying Ceramide Blend seals damage sites in the hair cuticle—smoothing and protecting hair from further damage
  • K18PEPTIDE™ replenishes protein lost during washing
  1. Apply a small amount of DAMAGE SHIELD protective conditioner from mid-lengths to ends and build as needed.
  2. Rinse thoroughly.
  3. For best results, use after shampooing with DAMAGE SHIELD shampoo.

Water (Aqua) (Eau), Isopropyl Palmitate, Stearyl Alcohol, Propanediol, Isopentyldiol, Behentrimonium Chloride, Tocopherol, Tocopheryl Acetate, sh-Oligopeptide-78, Alteromonas Ferment Extract, Prunus Amygdalus Dulcis (Sweet Almond) Oil, Simmondsia Chinensis (Jojoba) Seed Oil, Phospholipids, Jojoba Esters, Calcium Gluconate, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Ceramide NP, Phytosteryl/Isostearyl/Cetyl/Stearyl/Behenyl Dimer Dilinoleate, Polyquaternium-16, Stearalkonium Chloride, Isopropyl Alcohol, Butylene Glycol, Gluconolactone, Phenoxyethanol, Sodium Benzoate, Citric Acid, Sodium Hydroxide, Fragrance (Parfum), Hydroxycitronellal.

pairs well with
DAMAGE SHIELD pH protective shampoo
Rated 4.6 out of 5
Based on 334 reviews
Color-safe protective shampoo maintains hair health + strength
K18 molecular repair hair oil
Rated 4.7 out of 5
Based on 595 reviews
Weightless oil that strengthens, repairs damage + reduces frizz

Description

 

A nourishing, protective conditioner that helps shield hair from daily damage to help maintain hair health and improve smoothness and shine. Engineered to weightlessly soften and detangle while the K18PEPTIDE™ helps replenish hair during washing.

have questions?

Get started here
The mask and conditioner serve two different purposes. The K18 mask reverses damage in 4 minutes, while the K18 conditioner protects hair from daily damage for up to 3 days*. We recommend using the K18 mask first, waiting 4 minutes, then using conditioner for additional softening and detangling benefits between K18 mask days. *Disclaimers
No, the K18 conditioner will not cause buildup on hair. The highly concentrated, lightweight gel formula means a little goes a long way. Use less than you typically would with a traditional conditioner, and build as needed.
No, the K18 conditioner will not weigh hair down. This highly concentrated, lightweight gel formula softens, smooths, and detangles without film-forming silicones or waxes that can build up over time.
No, you do not need to reapply the K18 conditioner for continued UV protection. This product is clinically proven to protect hair against damage from UV rays for up to 3 days*. *Disclaimers
No, the K18 conditioner does not have SPF. The biotech-produced polysaccharide and fortifying ceramide blend help minimize the drying and damaging effects of UV rays on the hair's cuticle. This prevents hair from becoming rough, brittle, weak, and prone to breakage from UV damage for up to 3 days*. *Disclaimers

3-day damage protection, powered by biotech

why hair needs a shield

Damage happens every day from UV rays, mechanical styling, and environmental aggressors—weakening, dulling, and causing frizz on all hair types.

how the shield works

Protect hair BEFORE daily damage occurs. Our biology-first approach to haircare draws inspiration from nature’s resilience to harsh environments. Engineered into 3-day conditioning protection without the need to reapply.

expert-approved protection

Trichologist Angela Onuoha breaks down how common hair aggressors damage hair, and how DAMAGE SHIELD protects hair between K18 mask days.

all hair types need daily damage protection

Discover why PROs are recommending weightless conditioning protection to every client.

certified microbiome-friendly conditioning

Biology-first formula keeps your scalp microbiome in balance with 3-day conditioning damage protection.

feel what's possible with K18

See how K18 unlocks our community's expression

reviews

average rating 4.6 out of 5
Based on 217 reviews
  • 5 Stars
    171 Reviews
  • 4 Stars
    21 Reviews
  • 3 Stars
    12 Reviews
  • 2 Stars
    4 Reviews
  • 1 Star
    9 Reviews
88% of reviewers would recommend this product to a friend
217 Reviews
Reviewed by Debra N.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Heat damage
  • Fragile/brittle hair
  • Dryness
  • Frizz
  • Split-Ends
Hair Type
  • Fine/Thin
My Results
  • Less Frizz
  • Visible Difference
  • Soft Touchable Hair
  • Smoother Hair
  • Less Breakage
Rated 5 out of 5
Review posted

It works beautifully

This conditioner leaves my hair feeling soft, actually conditioned, and healthy. I love it!

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K18Hair

Thank you Debra! We appreciate your review!

Reviewed by Ally C.
Verified Buyer
I recommend this product
Age
25 - 34
Client Hair Concerns
  • Heat Damage
  • Color Care
  • Frizz
  • Chemical Damage
Client Hair Types
  • Medium Density
Client Results
  • Bouncy Hair
  • Stronger hair
  • Visible Difference
  • Defined Curl/Wave Pattern
Rated 5 out of 5
Review posted

Best shampoo ever

Love how this makes my hair feel and smell

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K18Hair

Thank you for your review!

Reviewed by Amy L.
Verified Buyer
I recommend this product
Age
45 - 54
Hair Concern
  • Chemical damage
  • Color-care
  • Frizz
  • Extending time between washes
Hair Type
  • Medium Density
My Results
  • Less Frizz
  • Soft Touchable Hair
  • Smoother Hair
  • Visible Difference
Rated 5 out of 5
Review posted

Liked this WAY more than expected!

What a great conditioner! Does an amazing job nourishing and also reduced frizz.

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K18Hair

Thank you for your review!

Reviewed by Abby B.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Chemical damage
  • Color-care
  • Fragile/brittle hair
  • Split-Ends
  • Extending time between washes
Hair Type
  • Medium Density
My Results
  • Stronger Hair
  • Less Breakage
  • Soft Touchable Hair
  • Shinier Hair
  • Cleaner, fresher hair
Rated 5 out of 5
Review posted

Great product

This is amazing!! My hair was stronger and healthier looking/feeling. It’s great that it protects against heat!!!

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K18Hair

Thank you Abby! Strong and healthy hair is a must!

Reviewed by Claudia V.
Verified Buyer
I recommend this product
Age
25 - 34
Hair Concern
  • Chemical damage
  • Fragile/brittle hair
  • Dryness
  • Oily hair/scalp
  • Extending time between washes
Hair Type
  • Fine/Thin
  • Straight/Wavy
My Results
  • Stronger Hair
  • Less Breakage
  • Smoother Hair
  • Oil absorbed
  • Cleaner, fresher hair
Rated 5 out of 5
Review posted

Love it

I have long fine hair and always felt like I could never find a shampoo/conditioner than felt right for me. I felt a bit intimidated by the price, versus drugstore products but there’s no doubt in my mind that this line is worth every penny. I restocked this conditioner and I’m about to restock the shampoo as well as give the dry shampoo a try. Like I said, long fine hair so it gets greasy kinda quick. I’ll keep you updated:)

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K18Hair

Caudia thank you for your review!

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