Leave-in for denser result treatment - Looking for a solution to denser hair? 83% of women agree that Serioxyl gives denser-looking hair. This super serum enriched is with Stemoxydine and Neohesperidin. Using Serioxyl kit for coloured hair, provides a 3 month programme for denser looking hair. Use daily for 3 months and apply up to 8 pipettes depending on the thickness of your hair. Work the product into the roots and ensure that it covers the scalp.