Olaplex N°.9 Bond Protector Hair Serum — 90 mL Heat Protectant, Pollution Shield & Lightweight Finish

Olaplex N°.9 Bond Protector™ Hair Serum is a lightweight, leave-in antioxidant serum that shields hair from heat up to 450°F, blocks pollution for up to 48 hours, and smooths tangles and static while improving shine and style memory.

This silicone-free, everyday finishing serum combines Olaplex Bond Building Technology™ with Red Algae Extract to protect and nourish all hair types. Designed to be weightless, N°.9 acts as a barrier against environmental stressors and heat styling without leaving residue, helping hair look smoother, retain style, and rebound into curls or waves with more elasticity.

How does N°.9 protect hair during heat styling?

N°.9 forms a lightweight protective layer that helps resist thermal damage from hot tools up to 450°F (232°C). The formula includes flexible polymers to support style shape while antioxidants neutralize free radicals generated by heat.

• Heat protection rating up to 450°F / 232°C
• Flexible PVP polymer helps maintain style and hold
• Antioxidant-rich Red Algae Extract reduces free-radical stress
• Silicone-free, so it won’t weigh down fine hair

Will this serum help with tangles, static, and frizz?

Yes — N°.9 provides rapid anti-tangle and anti-static control, improving manageability and leaving hair with a satin finish. Conditioning agents in the formula smooth the cuticle, making combing and styling easier while reducing flyaways.

• Cetrimonium Chloride conditions and smooths hair
• Reduces static for cleaner, sleeker lines
• Instant detangling for wet or dry hair
• Leaves a satin shine without heavy build-up

How does N°.9 defend against pollution and environmental damage?

Olaplex N°.9 includes ingredients that form a protective barrier to block airborne pollutants and particulates, with a clinically proven 48-hour Pollution Protection Index. The antioxidant content helps neutralize damaging molecules before they compromise bond integrity and surface shine.

• 48-hour pollution protection according to Olaplex testing
• Antioxidants neutralize free radicals from pollution
• Helps preserve color vibrancy and surface smoothness
• Designed for daily use to maintain protection in urban environments

How will N°.9 affect my hair’s style memory and bounce?

This serum enhances style retention and bounceback by supporting hair structure with Bond Building Technology™, so curls and waves spring back with less frizz and breakage. It works on all textures to improve elasticity and layering when combined with styling tools or air-drying.

• Bond Building Technology™ supports internal hair strength
• Improves style memory for longer-lasting shapes
• Enhances curl rebound and natural movement
• Lightweight finish preserves volume without stiffness

Who is this for: Olaplex N°.9 Bond Protector™ is formulated for anyone wanting lightweight protection from heat, pollution, and styling stress—ideal for color-treated, chemically processed, heat-styled, or naturally textured hair. Use daily as a leave-in before styling or to refresh and protect hair between washes for reduced tangling, less static, enhanced shine, and improved manageability.

Ingredients

Water (Aqua/Eau), Propanediol, Betaine, Quaternium-22, Sodium Hyaluronate, Bis-Aminopropyl Diglycol Dimaleate, Cetrimonium Chloride, Panthenol, Hydroxyethylcellulose, PVP, Guar Hydroxypropyltrimonium Chloride, Furcellaria Lumbricalis Extract, Pelvetia Canaliculata Extract, Xylitylglucoside, Polyquaternium-44, Anhydroxylitol, Maltitol, Citric Acid, Trisodium Ethylenediamine Disuccinate, Xylitol, Sorbic Acid, Phenoxyethanol, Ethylhexylglycerin, Sodium Benzoate, Fragrance (Parfum), Citral, Citronellol, Hexyl Cinnamal, Limonene, Linalool.