How to Use a Flat Iron to Make Your Hair Wavy for anyone interested in creating a new look with their hair, this video tutorial from Taylor shows how to create a wavy look using a flat iron. The first thing you should do is make sure to spray your hair using a heat protector. There are many products on the market, including one used in the tutorial which is by John Frieda. To begin, take a small section of hair. Starting at the root of your hair, turn the flat iron in and out as you slowly move down the strand of hair. Repeat these steps for each strand of hair. The trick is to make sure that you are pressing hard enough to make sure that the waves and the heat gets into your hair. To make sure that the waves stay, you can apply a mousse to get volume after you are done creating your waves with the flat iron. Then, spray some hair spray into your hair to make sure that the waves last all day. Learn how to get natural waves in your hair by using a flat iron and three styling products.