Cyclomethicone, Cyclopentasitoxane, Olive oil, Vitamin E, Vitamin B5, Hydrolyzed Maize Protein, Fragrance, Ethylhexyl Methoxycinnamate. Cortex Insulate Heat and UV Protector is a virtually weightless spray that protects hair against the harmful heat of hair dryers and styling irons as well as the sun that stresses your beautiful hair.