Olaplex - Hair Perfector No.3 - 250 ml Super delicious hair treatment for damaged hair from Olaplex. Effective and restorative treatment. The treatment is good for all hair types, but is especially good for worn, damaged or colored hair. Hair is constantly degraded by heat styling and continuous chemical treatments, so it's a good idea to use a restorative treatment about once a week. Olaplex Hair Perfector NO. 3 is also suitable for extensions.