Enhance your shine and repair it using Olaplex No. 3 Hair Perfector; the creator of bonds in the hair, uses the same active ingredient found in all professional Olaplex products. Suitable for all hair types, the innovative formula works at the molecular level to activate and renew dry damaged strands that have broken due to chemical, thermal, and mechanical effects. The product is ideal for weekly use between salon services to maintain strong and healthy hair. * The most common question I always ask is what is the difference between Olaplex 2 in salon treatment and the first home treatment Olaplex 3. The difference is this ... Olaplex No. 2 in salon treatment is a 15% concentration and the home treatment No. 3 is a 12.5% concentration. So No. 3 is the best thing to use at home to maintain previous salon treatments and keep your hair strong and healthy.