Blacklight Thickening Spray is a leave-in volumizing spray from Oligo Professionnel, meant to be applied at the blow-dry stage rather than as a finishing product — it's a pre-styling prep spray, not something you add once hair is already dry and styled.
Oligo's own directions are specific about timing: spray onto clean, towel-dried hair from root to ends, then blow-dry in sections. The brand states it can cut blow-dry time by around 25% while adding lift, fullness, shine, and heat protection.
Oligo doesn't publish a full ingredient list for this specific product anywhere we could find, so we're not making any organic, natural, or "clean" formula claims here — only what's actually stated about how it works and how to use it.