Strait Glatt Neutralizing Balm to be used with Strait Glatt Hair Straighter. Schwarzkopf Glatt Hair Straightening Cream straightens even frizziest hair, making it durably supple and manageable. The special Keratin-Care-Complex strengthens the hair structure, providing additional care and easy manageability. Glatt Schwarzkopf Hair Straightening Cream is designed to create permanent, natural-looking straight hair for those with naturally curly, frizzy or wavy hair.Number – 0 is for naturally very curly / naturally frizzy hair.