Indola Heat Protector 300ml. While the popularity of ceramic straightening irons continues, hair can become dry, brittle and frazzled. Beat the heat with new 4 4 Heat Protector containing 200 degrees centigrade heat stable ingredients. It provides maximum heat protection to create longer lasting straight, ‘ironed’ styles. The humidity resistent formula also helps reduce frizz and smoothes the hair for more even results. Protects against all forms of heat styling with a non-sticky finish.