A thermal protector or heat protector is a typically a spray or serum that is applied to the hair before heat styling to prevent damage. Heat protectant sprays help to minimize the damage by forming a protective barrier over the cuticle on the hair strand. Heat styling can be very damaging to natural hair and cause it to dry out. By using a thermal protector on your natural hair before blow-drying, curling or flat ironing, you prevent your curls from being severely damaged by the excessive heat. The best thermal protectors contain silicones and carrier oils such as Argan oil, which help to seal the hair cuticle and prevent moisture loss. Heat styling can destroy your curly locks! So even though your hair may look healthy for a short time, but in the long run, it will suffer damage if not prepped correctly before styling with heat. Most thermal hair protectors can be used on both dry and wet hair before you apply heat. Many sprays and serums are lightweight and will not weight down your natural hair. If the heat protector spray you choose contains Argan oil, it can also be used for 24 hour UV protection for your hair. Keep in mind that heat protectants only work on reducing the amount of damage caused by heat - it will not stop all damage from happening. Always spritz your hair completely from roots to tips to fully prevent thermal damage and dehydration.