WHAT IT IS Bonacure Fibre Force Fortifier Treatment is an intense conditioning treatment for extremely damaged hair. WHAT IT DOES Schwarzkopf Professional BC Bonacure Fibre Force Fortifier Treatment intensively replenishes extremely damaged hair. Return even the most eroded hair to its optimal level of force and resilience. For the first time the formulas with Micronized Hair-Identical Keratins penetrate deeply into the hair architecture to re-cement specifically the Cell-Membrane-Complex the intercellular bonding cement responsible for strong and resilient hair fiber. Within 4-10 weeks depending on the hair quality Fibre Force strengthens the hair and restores original hair quality.