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.