With the help of a blowdryer, dry hair 80%, separate them into sections and apply Bio Tanix Extreme Smoothing Step 2 layer by layer. After full application, cover with a plastic cap and allow to rest for 35 to 50 minutes (based on hair texture). After the rest period, rinse to remove the product at the shampoo sink. It is not necessary to use shampoo. NOTE: Rinse thoroughly.