Contains dimeticone, which kills lice by coating them.
• Clinically proven to kill head lice and eggs in just one application.
• Allergy Certified.
• Pesticide free.
• Only 1 x 15 minute treatment.
Hedrin Once has been shown to work with only one application but a further check should be carried out one week after application to make sure that no lice or eggs have managed to escape the coating.