Accessibility statement Skip to content
free returns. buy with confidence
free shipping on orders $50+*
DAMAGE SHIELD protective conditioner 8.5oz
Regular price $39
Regular price $0 Sale price $39
Meta
DAMAGE SHIELD protective conditioner
DAMAGE SHIELD protective conditioner 8.5oz
Image of conditioner: protects hair from 3 types of damage for up to 3 days*, environmental aggressors, UV rays, mechanical styling
Grey curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
Red curly hair before and after results using k18.
Red curly hair before and after results using k18.
Bleach blonde hair before and after results using k18.
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)
DAMAGE SHIELD protective conditioner 8.5oz
Mini versus full size product comparison
K18 routine guide
DAMAGE SHIELD protective conditioner
DAMAGE SHIELD protective conditioner 8.5oz
Image of conditioner: protects hair from 3 types of damage for up to 3 days*, environmental aggressors, UV rays, mechanical styling
Grey curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
Red curly hair before and after results using k18.
Red curly hair before and after results using k18.
Bleach blonde hair before and after results using k18.
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)
DAMAGE SHIELD protective conditioner 8.5oz
Mini versus full size product comparison
K18 routine guide
4.8
Rated 4.8 out of 5 stars
688 Reviews

DAMAGE SHIELD protective conditioner

Color-safe protective conditioner maintains hair health + strength

Size:
8.5oz
Regular price $39
Regular price $0 Sale price $39
Save Infinity
Color:
8.5oz

Notify me when back in stock

DAMAGE SHIELD protective conditioner

The DAMAGE SHIELD protective conditioner 8.5oz (Size: 8.5oz) isn't available now, but enter your email below and we'll notify you as soon as it's back.
OR
View Full Details
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

    • how to use

      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.

    • more to know

      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

    • key benefits

      * 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.

    • ingredients

      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, Limonene, Citrus Aurantium Dulcis Flower Oil, Citrus Aurantium Peel Oil, Citrus Limon Peel Oil, Coumarin, Tetramethyl Acetyloctahydronaphthalenes.

pairs well with
DAMAGE SHIELD pH protective shampoo
full-size leave-in molecular repair hair mask
Press + and − keys to zoom, arrow keys to pan.
DAMAGE SHIELD protective conditioner
DAMAGE SHIELD protective conditioner 8.5oz
Image of conditioner: protects hair from 3 types of damage for up to 3 days*, environmental aggressors, UV rays, mechanical styling
Grey curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
Red curly hair before and after results using k18.
Red curly hair before and after results using k18.
Bleach blonde hair before and after results using k18.
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)
DAMAGE SHIELD protective conditioner 8.5oz
Mini versus full size product comparison
K18 routine guide
DAMAGE SHIELD protective conditioner
DAMAGE SHIELD protective conditioner 8.5oz
Image of conditioner: protects hair from 3 types of damage for up to 3 days*, environmental aggressors, UV rays, mechanical styling
Grey curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
Red curly hair before and after results using k18.
Red curly hair before and after results using k18.
Bleach blonde hair before and after results using k18.
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)
DAMAGE SHIELD protective conditioner 8.5oz
Mini versus full size product comparison
K18 routine guide
your protective conditioner questions, answered

still have questions? visit our help center

can i use the conditioner instead of the mask?

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

will the K18 conditioner cause buildup on hair?

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.

will the K18 conditioner weigh hair down?

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.

does the K18 conditioner need to be reapplied for continued UV protection?

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

does the K18 conditioner have SPF?

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
3
days of conditioning protection against damage from UV rays, mechanical styling + environmental aggressors*
94%
agreed hair didn’t feel weighed down*
91%
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 Explore the Science
how to use damage shield conditioner

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
/ people
Trichologist Angela Onuoha explains what causes daily hair damage
Trichologist Angela Onuoha breaks down what causes daily hair damage, and how...
about Trichologist Angela Onuoha explains what causes daily hair damage
When Should I Use K18 Conditioner vs. Mask?
/ products
When Should I Use K18 Conditioner vs. Mask?
Damage repair or daily protection? Here’s the guide to finding the perfect K1...
about When Should I Use K18 Conditioner vs. Mask?
FUNdamentals 16: You can still use conditioner
/ products
FUNdamentals 16: You can still use conditioner
You know what's fun? When your product works. We'll be breaking down key info...
about FUNdamentals 16: You can still use conditioner
FUNdamentals 09: Skipping conditioner makes me nervous
/ products
FUNdamentals 09: Skipping conditioner makes me nervous
You know what's fun? When your product works. We'll be breaking down key info...
about FUNdamentals 09: Skipping conditioner makes me nervous
FUNdamentals 02: Masks + conditioners vs. K18
/ products
FUNdamentals 02: Masks + conditioners vs. K18
You know what's fun? When your product works. We'll be breaking down key info...
about FUNdamentals 02: Masks + conditioners vs. K18
Myth Busting 04: Conditioners
/ hair science
Myth Busting 04: Conditioners
We get it, skipping conditioner feels wrong. Especially when it’s been a post...
about Myth Busting 04: Conditioners
View All Shop all new arrivals
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 688 reviews
96%would recommend these products
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.
Customers Talked About
Write a Review (Opens in a new window)
688 reviews
  • Judy D.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD shampoo and conditioner sample
    I recommend this product
    Rated 5 out of 5 stars
    1 hour ago
    Ms. Dee

    Cleans and softens my hair

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    23 minutes ago

    Thank you so much for the 5-star review! We're thrilled to hear you love how DAMAGE SHIELD cleanses and softens your hair. 💙 We truly appreciate your support! ✨

  • Julie N.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD protective conditioner 8.5oz
    I recommend this product
    Age 45 - 54
    Hair Concern Chemical damage, Heat damage, Fragile/brittle hair, Split-Ends, Dryness
    Hair Type Straight/Wavy
    My Results Visible Difference, Less Breakage, Stronger Hair
    Rated 5 out of 5 stars
    2 days ago
    Shampoo damage shield

    My hair was chemically fried and was breaking off so bad! I’ve been using this for about 2 months and I can say my hair is looking so much healthier! I love this shampoo!

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

    Thank you so much for the 5-star review, Julie! We're thrilled to hear that DAMAGE SHIELD has helped restore your hair health. 💙 We truly appreciate your support! ✨

  • Joanne M.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective conditioner
    I recommend this product
    Age 55 - 64
    Hair Concern Chemical damage, Heat damage, Fragile/brittle hair
    Hair Type Fine/Thin
    My Results Visible Difference, Less Breakage, Smoother Hair, Stronger Hair, Soft Touchable Hair
    Rated 5 out of 5 stars
    3 days ago
    Best product ever!!!

    Best product I’ve ever used in my life!

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    3 days ago

    Thank you so much for the 5-star review, Joanne! We're thrilled to hear you love our Jumbo DAMAGE SHIELD protective conditioner. 💙 We truly appreciate your support! ✨

  • Allison H.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective conditioner
    I recommend this product
    Age 35 - 44
    Hair Concern Color-care, Heat damage, Chemical damage, Fragile/brittle hair, Frizz
    Hair Type Grey Hair, Straight/Wavy, Fine/Thin
    My Results Visible Difference
    Rated 5 out of 5 stars
    4 days ago
    So good - get the big one

    I did the smaller bottles first to try it out. A little shampoo goes a long way but I need more conditioner so I’d suggest the small shampoo and the big conditioner and you’ll run out around the same time.

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    4 days ago

    Thank you so much for the 5-star review, Allison! 💙 We're thrilled you're loving the Jumbo DAMAGE SHIELD protective conditioner and appreciate the helpful sizing tip! ✨

  • Stephanie
    Reviewing
    Jumbo DAMAGE SHIELD protective conditioner
    I recommend this product
    Rated 5 out of 5 stars
    4 days ago
    5 Stars

    I love how it makes my hair feel

    Was this helpful?

*Disclaimers

10