The Schwarzkopf Professional BC Bonacure Fibre Force Fortifying Primer is an essential pre-styling treatment designed to prepare severely weakened or damaged hair for further styling or chemical services. It works by reinforcing the hair structure from within, leading to improved resilience and manageability. This primer optimizes the hair fiber's condition, providing a protective shield against heat, mechanical stress, and processing damage. Regular use helps in achieving stronger, smoother hair that is easier to comb and style, setting the foundation for lasting, beautiful results.