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K18 conditioner bottle on a blue background
K18 hair care product lineup with mini, full, and jumbo sizes on a blue background
Educational poster about hair care, showing a stylized image of hair and text explaining why hair needs protection.
Diagram of hair damage protection with text and molecular structure illustration on a blue background
K18 Damage Shield hair product bottle on a blue background with text highlighting benefits
K18 Damage Shield hair care product with text on a blue background
Person getting hair washed with a focus on hair care product benefits.
Hand holding a K18 hair product bottle with white conditioner being dispensed onto another hand against a blue background
K18 hair care products on a colorful background with text about healthy hair routines.
K18 hair care routine guide with steps for repair and maintenance.
tilenew | color:black
4.8
Rated 4.8 out of 5 stars
490 Reviews

Jumbo DAMAGE SHIELD protective conditioner

Color-safe protective conditioner maintains hair health + strength - now in a jumbo size
Full Size - 8.5 oz
$56.00
Mini Size - 1.8 oz
$20.00
Jumbo Size - 16 oz
$84.00
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
  • Apply a small amount of DAMAGE SHIELD protective conditioner from mid-lengths to ends and build as needed.
  • Rinse thoroughly.
  • For best results, use after shampooing with DAMAGE SHIELD shampoo.

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.

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.

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4.7
Rated 4.7 out of 5 stars
442 Reviews
Color-safe protective shampoo maintains hair health + strength - now in a jumbo size

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.

 your protective conditioner questions, answered
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
clinically proven protection
0
days of conditioning protection against damage from UV rays, mechanical styling + environmental aggressors*
0
agreed hair didn’t feel weighed down*
0
agreed hair felt softer*
Powered by biotech-produced polysaccharide

Acts as a biomimetic shield to protect hair BEFORE daily damage occurs—preventing damage, dullness + frizz.

EXPLORE THE SCIENCE
how to use
1. Apply a small amount of DAMAGE SHIELD protective conditioner from mid-lengths to ends and build as needed.
2. Thoroughly rinse.

For best results, use after shampooing with DAMAGE SHIELD shampoo.
learn more on our blog

Trichologist Angela Onuoha explains what causes daily hair damage

 Trichologist Angela Onuoha breaks down what causes daily hair damage, and how these culprits cause hair breakage, frizz, and dull color. The soluti...

When Should I Use K18 Conditioner vs. Mask?

 Damage repair or daily protection? Here’s the guide to finding the perfect K18 healthy hair routine.

FUNdamentals 16: You can still use conditioner

 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.

FUNdamentals 09: Skipping conditioner makes me nervous

 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. 

FUNdamentals 02: Masks + conditioners vs. K18

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

Myth Busting 04: Conditioners

 We get it, skipping conditioner feels wrong. Especially when it’s been a post-shampoo ritual for as long as you can remember. We’re not here to cau...
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 490 reviews
Reviews Summary
Customers say this shampoo and conditioner transforms their hair after just a few uses. Many reviews mention noticeable improvements in softness, shine, and manageability. Users with curly hair report better moisture retention and less frizz, while those with fine hair appreciate that it doesn't weigh their hair down. Frequent comments address how a small amount of product creates rich lather and goes a long way. Many note they can extend time between washes while maintaining clean, fresh-looking hair. Reviews highlight the products' effectiveness for detangling and creating smoother, more manageable results.
Write a Review (Opens in a new window)
490 reviews
  • Angela A.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD shampoo and conditioner sample
    I recommend this product
    Rated 5 out of 5 stars
    Yesterday
    Best on the self

    Love these product from K18. They truly heal and improve hair. The shampoo and conditioner and pretty much the whole line has a nice fresh scent that does please the nose

    Was this helpful?
  • Britteny B.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD protective conditioner 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 weeks ago
    amazing!

    loved it so much .

    Was this helpful?
  • Becky R.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD shampoo and conditioner sample
    I recommend this product
    Rated 5 out of 5 stars
    3 weeks ago
    Hair texture so much softer!

    My menopause hair is so much softer and more manageable!

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    2 hours ago

    Thank you so much for your wonderful review, Becky! We're so happy this is giving your hair the care it needs during this time!

  • Marjorie C.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD shampoo and conditioner sample
    I recommend this product
    Rated 4 out of 5 stars
    3 weeks ago
    Jury is still out, but I’m hopeful!

    While I haven’t noticed a significant change to the health of my hair, I have noticed subtle changes …hair is a bit softer, and shinier!!

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    2 hours ago

    Thank you so much for your honest review, Marjorie! We're so happy to hear that you're already noticing those subtle but positive changes with the DAMAGE SHIELD shampoo and conditioner sample - it's wonderful that your hair is feeling softer and shinier! Sometimes the most meaningful improvements start with these gentle changes, and we're hopeful that you'll continue to see even more benefits as you keep using this protective formula.

  • Donna G.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD shampoo and conditioner sample
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    It works

    This is becoming a staple item

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    1 month ago

    It's wonderful to know it's working so well. Thank you for sharing your amazing experience with us!

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salonwaxpro.com
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