OLAPLEX No. 9 Bond Protector Nourishing Hair Serum is a leave-in, silicone-free hair serum to shield from pollution and heat that cause tangles, breakage, and static. OLAPLEX Bond Building Technology is paired with potent, antioxidant-rich Red Algae Extract to nourish hair, block pollutants, and neutralize free radicals. See satin shine, style memory, bounce back curls, anti-tangle and anti-static action, and heat protection up to 450F. For all hair types. 1. As the first step in your styling routine, apply a small amount to damp hair working upward from ends to roots. Use more as needed for longer, thicker hair. 2. Use alone or follow with No.6 Bond Smoother for frizz control and/or No.7 Bonding Oil for brilliant shine. 3. Style as usual - Air-dry for a soft texture. Blow-dry for a smooth finish. Diffuse for waves or curls.