Infused with the brand's patented bond-building technology, the Nº.9 Bond Protector Nourishing Hair Serum by Olaplex is an antioxidant hair serum that instantly shields hair from pollution for up to 48 hours and protects against heat up to 450ºF/232ºC. Free of silicone and sulfates, it also adds satin shine while improving style memory and reducing static and tangles.

OLAPLEX Bond Building patented Technology™, The professional hair brand that works at a molecular level to dramatically improve hair strength, repair damage and protect all hair types.

Apply half a pump from mid-shaft to ends on damp, towel-dried hair, working upward from ends to roots. Follow with your favorite Olaplex styling products or style as you normally would. Use it as the first step in your styling routine.

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