Nº.9 Bond Protector Nourishing Hair Serum

Silicone-free antioxidant serum for heat and pollution protection

✓CGM ApprovedProtein-FreeStep: Leave-In

Our Take

An out-of-shower styling serum confirmed silicone-free by Olaplex — making it one of the few CGM-approved products in the range. Apply to damp hair before styling to protect against heat up to 230°C, environmental pollutants, and everyday damage. Formulated with red algae extract. Adds softness and manageability without weighing curls down. Pairs well with No.6 for added frizz control, or with No.10 for a fully silicone-free styling routine.

Who is this for?

Our assessment — not the brand's claim

Curl Pattern

Porosity

LowNormalHigh

Free From

✓ Sulphate-Free✓ Silicone-Free✓ Paraben-Free

Ingredients at a Glance

Water

Solvent

Universal solvent and primary base of most hair products.

Propanediol

Solvent

Plant-derived solvent and humectant that helps other ingredients penetrate.

Betaine

Humectant

Natural humectant derived from sugar beets that conditions and moisturises.

Hydroxyethylcellulose

Thickener

Semi-synthetic thickener and film former derived from cellulose (wood pulp or cotton). Wat…

PVP

Film Former

Film-forming polymer for hold. Water-soluble, no buildup.

Free From

✓ Sulphate-Free✓ Silicone-Free✓ Protein-Free✓ Paraben-Free✓ Alcohol-Free

Want to know more about an ingredient? Browse the ingredient glossary →

How to Use

Apply 1–2 pumps to damp hair working upward from ends to roots. Do not rinse. Use as the first step in your styling routine before creams or gels. Can also be applied on dry hair between washes for added protection.