Olaplex No.3 Hair Perfector, a luxurious at home deep treatment for dry, damaged and brittle hair. Using the same active bonding ingredient used in all salon Olaplex treatments. It reconnects the broken bonds caused by colouring, excessive heat and lightening in all hair types providing real, structural repair.For best results: Apply generous amount to towel dried hair and comb through. Leave in hair for 10-30 minutes or even 90 minutes. Rinse thoroughly, shampoo and condition.