DAMAGE SHIELD protective conditioner 31.5oz (WHOLESALE)

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 model: PRO TIP: for added detangling post-service, apply DAMAGE SHIELD protective conditioner after K18 pro molecular repair hair mask + waiting 4 minutes.

image of models. shield your healthiest hair against daily damage

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 backbar size conditioner: how to add the DAMAGE SHEILD to the K18 molecular repair service

DAMAGE SHIELD protective conditioner

Smoothing conditioner detangles + protects from daily damage

Rated 4.6 out of 5

Based on 101 reviews

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

Professional Only

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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

For your services
Can be used for added smoothness, softness + detangling after the K18 PRO molecular repair hair mask.

Shampoo, do not condition.
Towel-dry thoroughly.
Apply 1-3 pumps of the PRO molecular repair hair mask.
Wait 4 minutes. Do not rinse out.
Apply a small amount of DAMAGE SHIELD protective conditioner from mid-lengths to ends. Build as needed.
Rinse thoroughly.
You do not need to re-apply the PRO molecular repair hair mask.

For client 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.

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 4.7 out of 5

Based on 251 reviews

Back bar size of our color-safe, protective shampoo to maintain hair health + strength Log In / REGISTER

molecular repair hair oil

Rated 4.8 out of 5

Based on 301 reviews

Weightless oil that strengthens, repairs damage + reduces frizz Log In / REGISTER

Description

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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 in the salon, or at home 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. Inspired by nature’s resilience to harsh environments, our biotech-produced polysaccharide delivers 3-day conditioning protection without reapplying.

expert-approved protection

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

PRO to PRO

See how PRO stylists are protecting hair + educating clients on DAMAGE SHIELD.

Learn how dimensional color specialist Tabitha Dueñas detangles with DAMAGE SHIELD in a lightening service.

PRO stylists Tabitha Dueñas + Emily Chen share how they chat about DAMAGE SHIELD with every client.

See how natural/curly hair and color specialist Marcel Henriquez smooths, softens and detangles curly + coily hair in the salon—without weighing hair down.

want to learn more?

Explore DAMAGE SHIELD tips, tricks, and science deep dives on the blog.

PRO Tips to Smooth + Soften Curly + Coily Hair During Services

Our guide to adding conditioning protection to your service routine. Read More

How to Talk To Your Clients About DAMAGE SHIELD protective conditioner

Discover how to educate + retail weightless conditioning protection to every client. Read More

When Should I Use K18 Conditioner vs. Mask?

Get the guide to repairing and protecting every client’s hair. Read More

The Science of Hair Slip

Learn about the slippery ingredients preventing mechanical damage, and how we use biotech to avoid buildup. Read More

feel what's possible with K18

See how K18 unlocks our community's expression

reviews

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average rating 4.6 out of 5

Based on 101 reviews

5 Stars

80 Reviews
4 Stars

12 Reviews
3 Stars

6 Reviews
2 Stars

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1 Star

3 Reviews

91% of reviewers would recommend this product to a friend

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Reviewed by Kristin S.

Verified Buyer

Reviewing

DAMAGE SHIELD protective conditioner 8.5oz (WHOLESALE)

I recommend this product

Age

45 - 54

Hair Concern

Frizz
Dryness

Hair Type

Thick/Coarse
Grey Hair

My Results

Less Frizz
Smoother Hair
Soft Touchable Hair

Rated 5 out of 5

Review posted

Great

Love how it makes my hair feel and I think it’s making it look healthier too

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K18Hair PRO

Healthy looks amazing doesn't it! Thank you for your review!

Reviewed by Jill

Verified Buyer

Reviewing

DAMAGE SHIELD protective conditioner 8.5oz (WHOLESALE)

I recommend this product

Age

55 - 64

Hair Concern

Chemical damage
Frizz
Fragile/brittle hair

Hair Type

Medium Density

My Results

Less Frizz
Visible Difference
Smoother Hair

Rated 4 out of 5

Review posted

Love the products but HARD to get out of bottles!

Love the K18 products but it’s Really Hard to squeeze the liquids out of the HARD plastic bottles! I have to use my teeth! and the force of my jaw to get the liquid to come out. My fingers aren’t that strong, and hands are wet of course, so I can’t get any force behind my fingers to get the bottles to bend easily when I try to squeeze!! Please reconsider your packaging to make it easier to dispense your great products! TY

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K18Hair PRO

We apologize about this inconvenience. We will forward your feedback to our product development team.

Reviewed by Christopher G.

Verified Buyer

Reviewing

DAMAGE SHIELD protective conditioner 8.5oz (WHOLESALE)

I recommend this product

Age

35 - 44

Client Hair Concerns

Chemical Damage
Color Care
Frizz
Heat Damage

Client Hair Types

Medium Density
Straight/Wavy
Thick/Coarse

Client Results

Stronger hair
Less Breakage
Less Frizz

Rated 5 out of 5

Review posted

Highly Recommend

I have been using the K18 Pro Mist and Molecular Mask for about 4 years now…….both quickly became a mandatory part of all of my color services.

I recommend the Damage Shield duo to anyone who doesn’t want to spend a lot of time on their hair. Unfortunately, the reality is that many clients don’t use color safe products or heat protection on their hair….. this is a “no brainer”, because it does all of the above. …… and has an attractive price point.

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K18Hair PRO

Thank you for your review Christopher!

Reviewed by Tammy R.

Verified Buyer

Reviewing

DAMAGE SHIELD protective conditioner 8.5oz (WHOLESALE)

I recommend this product

Age

45 - 54

Hair Concern

Fragile/brittle hair
Frizz

Hair Type

Fine/Thin
Straight/Wavy

My Results

Less Frizz
Visible Difference
Less Breakage
Stronger Hair
Cleaner, fresher hair

Rated 5 out of 5

Review posted

Best product

This conditioner is amazing! I've been struggling with hair loss after weight-loss and K18 has helped my hair tremendously. I highly recommend this conditioner as well as the shampoo. Life changing!

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K18Hair PRO

Thank you for your review Tammy!

Reviewed by Peggy

Reviewing

DAMAGE SHIELD protective conditioner 8.5oz (WHOLESALE)

I recommend this product

Age

65+

Hair Concern

Frizz

Hair Type

Grey Hair

My Results

Visible Difference
Less Frizz
Smoother Hair
Shinier Hair
Soft Touchable Hair

Rated 5 out of 5

Review posted

It works!

I love this conditioner. It left my hair detangled and soft. My hair has changed since it turned gray. It became frizzy, curly, and unmanageable. Now it looks great and is easy to style.

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