Products / Olaplex / Nº.9 Bond Protector Nourishing Hair Serum / When to use

When (and how) to use Nº.9 Bond Protector Nourishing Hair Serum by Olaplex

Last updated on May 21, 2025.

Overview

Welcome to our guide on when (and how) to use Olaplex Nº.9 Bond Protector Nourishing Hair Serum.

When to use

We recommend using this product in the morning or evening.

In your routine

This product is most commonly used as step 9 in a routine. Use our Routine Creator to see where you should use this product in your routine.

Fun Fact

26 routines created by our community use this product.

1. As the first step in your styling routine, apply a small amount to damp hair working upward from ends to roots. 2. Use more as needed for longer, thicker hair. 3. Use on days you wash your hair and any days in between for added protection.

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Pair it with

Here are some of the products that our community often uses together with Nº.9 Bond Protector Nourishing Hair Serum.

Olaplex No.7 Bonding Oil Used together in 27% routines

Olaplex No.8 Bond Intense Moisture Mask Used together in 15% routines

Olaplex No.3 Hair Perfector Used together in 15% routines

Learn more about the ingredients in this product

Check out our complete breakdown of the ingredients and their benefits/drawbacks

See ingredient breakdown

Routine inspiration

Here are some routines that have been shared by our community that use Nº.9 Bond Protector Nourishing Hair Serum.

used in the morning

Kérastase Elixir Ultime Hydrating Hair Oil Serum

Kérastase Discipline Bain Fluidealiste Shampoo USA

Kérastase Discipline Smoothing Conditioner for Frizzy Hair

Kérastase Discipline Smoothing Hair Mask for Frizzy Hair

Frizz-Free Hair Delight: A 5-Step Haircare Routine for Taming Frizzy Locks

Learn more

Check out our complete guide to the ingredients in Olaplex Nº.9 Bond Protector Nourishing Hair Serum.

See the full ingredient explanation

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