The Nº.7 Bond Building Oil, containing OLAPLEX Bond Building Technology, is a weightless treatment oil that adds shine, softness and color vibrancy while providing heat protection up to 232º C (450º F). Benefits: Nº.7 Bond Building Oil fortifies & safeguards hair, increasing radiance, suppleness & color brilliance, guarding from heat up to 450ºF (232ºC). Nº.7 Bond Building Oil revives hair's healthy look and feel. Nº.7 Bond Building Oil is Sulfate Free and PH balanced. How To Use: Release the cap and invert the bottle. Gently press your index finger onto...