Front of bottle of Blacklight Blonde Science Repair Leave-In Conditioner for Blonde Hair 100ml

Back of bottle of Blacklight Blonde Science Repair Leave-In Conditioner for Blonde Hair 100ml

Bottles of Blacklight Blonde Science Repair Collection on purple background

Model posing in front of a white background after using the Blacklight Blonde Science Repair Hair Products

rep [repair]

Repair Leave-In Conditioner

$38.00 CAD

Best For:

Blonde or lightened
Damaged, fragile, or weakened
In need of strength, smoothness, and manageability
Prone to breakage, split ends, or frizz

Size: 100 ml / 3.38 fl. oz

One-time purchase $38.00

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A lightweight leave-in conditioner that hydrates, smooths, and strengthens damaged blonde hair, reducing breakage and frizz while enhancing shine and providing heat and environmental protection.

About Repair Leave-In Conditioner

Give damaged blonde hair a daily boost of care. Blacklight Repair Leave-In Conditioner delivers lightweight hydration while helping strengthen and protect fragile strands. Powered by REP technology with ceramide NG, superfood extracts, and nourishing apricot kernel and argan oils, it helps smooth damage and restore softness.

This multi-benefit leave-in tames frizz, reduces breakage, boosts shine, and protects hair from heat—leaving blonde hair softer, stronger, and easier to style every day.

How To Use

Apply to clean, damp hair
Comb through to distribute evenly
Style as desired
Use daily or as needed for hydration, shine, and protection

FAQs

Repair Leave-In Conditioner

What does the Repair Leave-In Conditioner do?
Think of it as daily protection for your blonde. It hydrates, smooths frizz, strengthens fragile strands, and helps protect hair from heat and everyday stress.

Will it make my hair greasy or heavy?
Not at all. The formula is lightweight, so it nourishes and protects while keeping hair soft, airy, and full of movement.

Does it help with frizz and tangles?
Yes! It smooths frizz and makes detangling much easier, leaving hair silky and manageable.

Does it protect from heat styling?
Yes. It helps shield hair from heat tools and environmental stress while strengthening the hair fiber.

What makes it special?
It’s powered by REP technology with ceramide NG, superfood extracts (quinoa, chickpea, lentil), and nourishing oils to help repair and protect damaged blonde hair.

Still looking for help? View all our FAQs Here

Shipping & Returns

We offer free shipping on orders over $50 across Canada and the Continental United States. Orders below $50 are shipped at a flat rate of $10.

Our team will typically ship your order within 2 business days. When your package leaves our warehouse, you’ll receive an email with your tracking information.

Most customers receive their order within 3–7 business days from the date of purchase, depending on the destination.

Repair Leave-In Conditioner100 ml / 3.38 fl. oz

$38.00 CAD

Sulfate-Free

Paraben-Free

Preservative-Free

Gluten-Free

Repair Leave-In Conditioner

Leave it in. Let the repair begin.

This lightweight leave-in hydrates, smooths frizz, and helps strengthen fragile blonde hair while protecting it from heat and daily stress. Powered by REP technology with ceramide NG, superfood extracts, and nourishing oils, it leaves hair softer, shinier, and much easier to style—every single day.

Stronger hair after just one use. Reduce hair breakage up to 73%.*

Read The Report

My blonde feels instantly softer and easier to style after using the Repair Leave-In Conditioner. It smooths frizz, adds shine, and keeps my hair feeling strong all day.

— Cristina L.

The Science

A synergistic blend of skincare actives and superfoods

Ceramide NG

A clinically proven skincare active, ceramides repair the structural integrity of hair by sealing the cuticle, locking in moisture. Less damage and breakage, better colour retention and resilience.

Argan Oil

Known as ‘liquid gold,’ argan oil is rich in linoleic acid and vitamin E, replenishing the fatty acids and moisture stripped by bleach and colour to make blonde hair softer, shinier, golden.

Lentil and seed oil icon describing Blacklight Blonde Science hair products

Lentil Extract

Our synergistic superfood complex is hydrolyzed for better absorption, delivering amino acids directly to the hair fibre to reinforce it from within for more resilient, elastic blondes.

Chickpea Extract

Our synergistic superfood complex is hydrolyzed for better absorption, delivering amino acids directly to the hair fibre to reinforce it from within for more resilient, elastic blondes.

The Science

Trusted by salons, stylists & blondes

Front of bottle of Blacklight Blonde Science Moisture 18-in-1 Beautifier 225ml #size_225 ml / 7.6 fl. oz

18-in-1 Beautifier $14.00

Scientists talking about the launch of Blacklight Blonde Science Hair Care Products

Front of bottle of Blacklight Blonde Science Blue Neutralizing Spray 225 ml

Blue Neutralizing Spray $38.00

Front of bottle of Blacklight Blonde Science Blue Shampoo for Blonde Hair 300ml #size_300 ml / 10.1 fl. oz

Blue Shampoo $16.00

Front of bottle of Blacklight Blonde Science Neutralizing Blue Conditioner 200ml #size_200 ml / 6.8 fl. oz

Blue Conditioner $16.00

Front of jar of the Blacklight Blonde Science Hydrating Mask 225ml #size_200 g / 7.05 fl. oz

Hydrating Mask $18.00

Jessica M., Los Angeles, CA

Blacklight Blonde Science products feel salon-quality. My hair has never looked healthier or brighter.

Emily R., Chicago, IL

The quality of Blacklight Blonde Science products is incredible. You can tell real science went into creating them.

Sarah K., Austin, TX

I’ve tried many brands, but Blacklight Blonde Science stands out for quality, performance, and beautiful results.

Sophie L., Montreal, QC

Premium formulas, amazing results, and gorgeous packaging. Blacklight Blonde Science truly feels like professional hair care.

Megan T., Vancouver, BC

Finally a brand dedicated to blondes that actually delivers high-quality products that work.

Olivia B., Toronto, ON

Blacklight Blonde Science quickly became my go-to brand. The quality and results are simply outstanding.

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The rep [repair] Collection

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Hair and Scalp Oil

$48.00 CAD

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3 bottles of Blacklight Blonde Science Repair Products for Blonde Hair including a shampoo, conditioner and mask that are included in a bundle

Repair Bundle

$100.00 CAD

$118.00 CAD

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Repair Mask

From $18.00 CAD

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Frequently asked questions

Questions about your formula, your order, or your hair? Find our most frequently asked questions below. Still need help? Contact us.

Vist FAQs

Are your products cruelty-free?

We’re committed to creating professional-quality haircare that delivers real results—without the premium price tag. And of course, our products are cruelty-free. No animal testing here… we prefer to test on happy humans instead!

Where is your company located?

Our office, warehouse, and production facility are all based in Montreal, Quebec, Canada. We proudly formulate and manufacture our products in-house, all under one roof—powered by one passionate team.

Can I return a product?

Your satisfaction is important to us. If your purchase isn’t quite right, simply contact our customer service team to request a return authorization and instructions.
Most products can be returned within 30 days, provided they are unused, unopened, and in their original packaging.

What makes your products unique?

Every Blacklight Blonde Science formula is made with a synergistic blend of skincare actives and nutrient-dense superfoods, proving that better hair begins with better ingredients.

How can I contact your customer service team?

Have a question? Our customer service team is here to help, Monday to Friday, 8am to 4pm ET by email at info@blacklightblondescience.com Whether you’d like to learn more about the Blacklight Blonde Science brand, need help choosing the right products for your hair, or have questions about your order or shipment, we’re happy to assist. Reach out anytime and we’ll make sure you get the answers you need.

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Repair Leave-In Conditioner

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Repair Leave-In Conditioner