Zenix keratine hair straightener cream straightens your hair while caring for it. However, duration may vary depending on the processes applied to the hair. In order to ensure the durability of the straightening procedure, you should use shampoos and hair conditioners that are free of sulfate. This will ensure the durability of the process. USAGE: How to Use: Wash your hair twice with Zenix Pro Keratin Purifying Shampoo. Wet the hair with a towel and dry the hair to keep it moist. Apply keratin cream to all hair with a brush, depending on the length and structure of the hair. Avoid contact with the scalp, neck and face. With the help of a fine toothed comb, keratin cream is thoroughly fed into the hair. Wait 45 minutes after applying to all hair. Apply a blow-dry to only to give heat to hair (Do not use high heat, high temperature will interact with keratin prematurely). Wash hair twice with sulfate-free shampoo and use conditioner. Blow dry the hair well and use a straightener.