OLAPLEX N°.7 Bonding Oil is the first-of-its-kind. Highly concentrated, ultra-lightweight, reparative styling oil dramatically increases shine, adds softness and strength, and enhances all hair types and textures. When used with any thermal styling appliance N°.7 provides heat protection up to 450°F/230°C. How To Use Remove cap. Invert bottle and gently tap index finger on the bottom to dispense a metered drop. Apply a small amount to damp or dry hair, style as desired. How much you use depends on hair length and texture. Repairs damaged and compromised hair Strengthens and protects hair structure Restores healthy appearance and texture Improved luster, shine, and manageability Paraben-Free, Sulfate-Free, Cruelty-Free and Suitable for vegans