- A weightless, antioxidant-rich, nourishing serum powered by patented Olaplex bond-building technology - Provides protection from pollution for up to 48 hours and heat up to 450°F/232°C - Increases manageability, provides style memory, reduces static, and enhances shineOLAPLEX No.9 Bond Protector Nourishing Hair Serum Read The Beginners Guide to Olaplex here Powered by patented Olaplex Bond Building Technology™, the Olaplex No.9 anti-damage hair shield is a silicone-free, antioxidant-rich serum that increases manageability, delivers satin shine, provides style memory, and protects hair from pollution and heat up to 450°F/232°C. No.9 is packed with antioxidant-rich ingredients including Red Algae Extract to neutralize free radicals, prevent damage, and nourish the hair from the inside out.Pollutants create free radicals that destroy hair bonds and proteins causing tangles, split ends, breakage, and hair that’s hard to style. Antioxidants can prevent free radical damage, but your hair doesn’t absorb most of them as your skin does. Red Algae Extract bonds to wet hair like an invisible shield to block pollutants, nourish hair, and deliver potent antioxidants to the cuticle that neutralize free radicals before they cause damage.Olaplex No.9 is Cruelty-free, Vegan, and free from Gluten, Nuts, Parabens, Phosphate, Phthalate, Sulfate, and Silicone.Key Benefits: Provides protection from pollution for up to 48 hours and heat up to 450°F/232°C Increases manageability, provides style memory, reduces static, and enhances shine Packed with antioxidant-rich ingredients including Red Algae Extract to neutralize free radicals, prevent damage, and nourish the hair from the inside out Multi-beneficial results for all hair types and textures How to use: Apply a small amount to damp, towel-dried hair, working upward from ends to roots. Add more as needed. Style with either No.6 and/or No.7 as required. Air-dry for a soft texture. Blow-dry for a smooth finish. Diffuse for waves or curls. Avoid contact with eyes.  Suitable for all hair types.  FREQUENTLY ASKED QUESTIONS: Q. What is the difference between No.9 and No.6? A. No.9 is an anti-damage hair shield. It is a silicone-free, weightless, antioxidant-rich serum that increases manageability, provides style memory, and protects from heat and pollution. No.6 is a styling treatment – with the primary benefits of anti-frizz control for up to 72 hours, faster blow-drying, while smoothing, moisturizing, and strengthening the hair. You can absolutely use both! We recommend using No.9 prior to using No.6! Size: 90ml