To keep your hair and skin healthy, it is reccomeded that you use sunblock. Here is a recipe for Home Made Sunscreen for curly hair.
Many natural oils can act as a sunbock. Carrot seed oil has a SPF of 38-40, while oilve oil can have a SPF of 2-8. Mix 3 or 4 of theses oils in equal parts, and incorpoerat them in your styling regomine. You can also use grapeseed oil as your base and sweeten things up with raspberry oil, and macadiamia oil. Combine theses oils in a small jar and use as needed, and during the final parts of styling. If your hair loves the thick stuff, reach for Avocado oil to coat your strands before heading out the door.