The Nº.9 Bond Protector Nourishing Hair Serum, infused with patented OLAPLEX Bond Building Technology, is a silicone-free antioxidant hair serum that instantly shields hair from pollution and protects against heat damage while adding satin shine and reducing static and tangles. BENEFITS Nº.9 Bond Protector Nourishing Hair Serum neutralizes free radicals and protects against pollution for up to 48 hours. Nº.9 Bond Protector Nourishing Hair Serum improves style memory and bounceback curls. Nº.9 Bond Protector Nourishing Hair Serum provides Heat protection up to 450ºF (232ºC) for a satin shine look. Nº.9 Bond Protector Nourishing Hair Serum reduces tangles and static. Nº.9 Bond Protector Nourishing Hair Serum is Silicone free, Sulfate free and PH balanced. HOW TO USE As the first step in your styling routine, apply a small amount to damp, towel-dried hair, working upward from ends to roots. Follow with your favorite OLAPLEX styling products, or, style as you normally would.