Restore Your Hair’s True Strength

Transform your hair with Nº.4 Bond Maintenance® Shampoo — the ultimate repair and care formula that rebuilds bonds, boosts shine, and leaves every strand silky and resilient.

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“My hair has never felt this soft and healthy! After using Nº.4 shampoo, the breakage reduced dramatically, and my hair feels stronger every day.”

- Anna, verifed review

Cleanse

Strengthen

Smooth

Cleanse

Strengthen

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Strengthen

Smooth

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Strengthen

Smooth

Cleanse

Strengthen

Smooth

Cleanse

Strengthen

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Strengthen

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Stronger, Smoother, Healthier Hair — Every Wash

Nº.4 Bond Maintenance® Shampoo goes beyond cleansing — it rebuilds, hydrates, and protects hair from everyday damage. Enjoy salon-level strength, shine, and softness with every use.

💪 Strength & Repair

Reduces breakage while reinforcing weak hair bonds for a visibly stronger, healthier look.

🧴 Gentle Cleansing

Effectively removes buildup and impurities without stripping your hair’s natural oils.

💧 Deep Hydration

Infuses moisture into every strand, leaving hair soft, smooth, and nourished.

✨ Easy Detangling

Tames frizz and smooths the cuticle, making brushing and styling effortless.

What Our Customers Are Saying

After just two washes, I noticed less breakage and so much more shine. It’s like my hair finally got the reset it needed.

— Emily R.

I’ve tried dozens of shampoos for damaged hair, but this one truly repairs and hydrates without weighing it down.

— Jessica M.

This shampoo makes brushing my hair effortless. It’s hydrated, shiny, and so easy to manage now!

— Lauren B.

This shampoo makes brushing my hair effortless. It’s hydrated, shiny, and so easy to manage now!

— Rachel K

Nº.4 Bond Maintenance® Shampoo — Strength in Every Wash

A professional-grade shampoo that gently cleanses while rebuilding hair bonds. Formulated to reduce breakage and strengthen from root to tip, it leaves hair feeling clean, soft, and resilient without stripping essential moisture.

Transformative Customer Results

92%

noticed smoother, more manageable hair

87%

said it significantly improved their hair’s health and confidence

87%

experienced less breakage

100%

reported it improved their overall hair care routine and quality of life

See Up to 49% Less Breakage with Every Use

Experience visibly healthier, stronger, and smoother hair after every wash. Regular use of Nº.4 Bond Maintenance® Shampoo delivers long-lasting strength, restored elasticity, and a noticeable reduction in breakage.

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    Frequently Asked Questions

    Can Nº.4 Bond Maintenance® Shampoo be used every day?

    Nº.4 Bond Maintenance® Shampoo is formulated for daily use, or however frequently you wash your hair.

    How much Nº.4 Bond Maintenance® Shampoo should I use?

    Nº.4 Bond Maintenance® Shampoo is a highly concentrated formula; a little bit goes a long way. OLAPLEX recommends starting with a dime size amount and add more as needed.

    How soon will I see results?

    Most users feel improvements in blood sugar, energy, and cravings within 2 weeks.

    Is Nº.4 Bond Maintenance® Shampoo color-safe?

    Yes, Nº.4 Bond Maintenance® Shampoo is color-safe.

    Does Nº.4 Bond Maintenance® Shampoo contain sulfates?

    No, Nº.4 Bond Maintenance® Shampoo is free of SLS/SLES sulfates.

    Is Nº.4 Bond Maintenance® Shampoo good for curly hair?

    Yes, curly hair can also benefit from this shampoo.