Ultra-nourishing yet completely weightless, the innovative Olaplex No 7 Bonding Oil restores and renews your hair without coating it in a greasy film. Quite the contrary, expect silky smooth lengths that shine brighter than the oil itself. Formulated to rebuild the damaged disulphide bonds in your hair, the star ingredient is bis-aminopropyl diglycol dimaleate – sounds science-y but it works to strengthen and repair damage post-colouring, bleaching or heat styling (and it even works wonders on 'virgin' hair!) Perfect as a conditioning treatment or a styling step (it protects against heat up to 450°!), Olaplex No 7 Bonding Oil sinks into stressed-out tresses to make them instantly more manageable – smoothing frizz and taming flyaways in its wake.