Accessibility statement Skip to content
free returns. buy with confidence
free shipping on orders $50+*
K18 conditioner bottle on a blue background
K18 hair care product lineup with mini, full, and jumbo sizes on a blue background
Jumbo DAMAGE SHIELD protective conditioner
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 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.
K18 conditioner bottle on a blue background
K18 hair care product lineup with mini, full, and jumbo sizes on a blue background
Jumbo DAMAGE SHIELD protective conditioner
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 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.
4.8
Rated 4.8 out of 5 stars
678 Reviews
new

Jumbo DAMAGE SHIELD protective conditioner

Color-safe protective conditioner maintains hair health + strength - now in a jumbo size

Size:
16oz
Regular price $59
Regular price $0 Sale price $59
Save Infinity
Color:
16oz

Notify me when back in stock

K18 conditioner bottle on a blue background

The Jumbo DAMAGE SHIELD protective conditioner (Size: 16oz) 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
      • 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.
    • 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
jumbo leave-in molecular repair hair mask
Jumbo DAMAGE SHIELD pH protective shampoo
Press + and − keys to zoom, arrow keys to pan.
K18 conditioner bottle on a blue background
K18 hair care product lineup with mini, full, and jumbo sizes on a blue background
Jumbo DAMAGE SHIELD protective conditioner
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 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.
K18 conditioner bottle on a blue background
K18 hair care product lineup with mini, full, and jumbo sizes on a blue background
Jumbo DAMAGE SHIELD protective conditioner
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 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.
your protective conditioner questions, answered
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 678 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)
678 reviews
  • Alyssa L.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective conditioner
    I recommend this product
    Age 25 - 34
    Hair Concern Frizz, Dryness, Oily hair/scalp, Extending time between washes, Split-Ends
    Hair Type Thick/Coarse, Medium Density, Straight/Wavy
    My Results Less Frizz, Visible Difference, Stronger Hair, Oil absorbed, Smoother Hair
    Rated 5 out of 5 stars
    5 hours ago
    Love love love it.

    This really has saved my hair. It was dry, dull, and just ugly lol. I like that you don’t have to use much. I have long hair that goes to my lower back and its thickness is about medium I guess I would say… this bottle has lasted me almost exactly 6 months. I now only have to wash and condition one a week. It’s helped with oil on my scalp also.

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

    Thank you so much for the love, Alyssa! 💙 We're thrilled that Jumbo DAMAGE SHIELD has transformed your hair and become such a staple in your routine. ✨

  • Ambraiza
    Reviewing
    DAMAGE SHIELD protective conditioner 8.5oz
    I recommend this product
    Rated 5 out of 5 stars
    15 hours ago
    5 Stars

    Love this product and will buy again 100%

    Was this helpful?
  • Stacy F.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective conditioner
    I recommend this product
    Age 35 - 44
    Hair Concern Chemical damage, Heat damage, Color-care, Fragile/brittle hair, Dryness
    Hair Type Fine/Thin, Medium Density, Curly/Coily
    My Results Less Breakage, Bouncy Hair, Stronger Hair, Visible Difference, Smoother Hair
    Rated 5 out of 5 stars
    3 days ago
    Moisturized + Protected

    This conditioner keeps my hair silky and manageable. I deal with breakage due to bleach so it’s important that I use a conditioner that strengthens my hair while keeping it moisturized. This is it!

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

    Thank you so much for the love! 💙 We're thrilled to hear the Jumbo DAMAGE SHIELD is keeping your hair silky, manageable, and protected. We're so happy it's your go-to! ✨

  • Sharon C.
    Verified Buyer
    Reviewing
    Jumbo DAMAGE SHIELD protective conditioner
    I recommend this product
    Age 65+
    Hair Concern Chemical damage, Color-care, Dryness
    Hair Type Medium Density
    My Results Stronger Hair, Soft Touchable Hair, Cleaner, fresher hair
    Rated 5 out of 5 stars
    4 days ago
    excellent product

    Leaves my hair soft, detangles, and condtioned

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

    Thank you so much for the love! 💙 We're thrilled to hear you're loving the Jumbo DAMAGE SHIELD protective conditioner and how soft and detangled it leaves your hair! ✨

  • Tabitha L.
    Verified Buyer
    Reviewing
    DAMAGE SHIELD protective conditioner 8.5oz
    I recommend this product
    Age 35 - 44
    Hair Concern Heat damage
    Hair Type Thick/Coarse
    My Results Less Frizz, Stronger Hair
    Rated 5 out of 5 stars
    4 days ago
    Love the product

    This product has restore my hair incredibly!

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

    Thank you so much for the love! 💙 We're thrilled to hear that DAMAGE SHIELD has restored your hair incredibly! ✨

*Disclaimers

10