Frequently Asked Questions

Get answers to common questions about K18 Damage Shield Shampoo 8.5.

K18's patented peptide works at the molecular level to reconnect and rebuild broken keratin chains. The shampoo cleanses while delivering active peptides that penetrate the cortex, restoring tensile strength and elasticity for reduced breakage and stronger hair.

Yes. The formula is color-safe and designed to maintain color vibrancy while repairing internal damage. It helps minimize color fade by preserving cuticle integrity, making it ideal for chemically-treated, highlighted, or naturally colored hair.

Use it as your regular cleansing shampoo or alternate with your current cleanser based on hair needs. In salon, a single application provides immediate benefits; for maintenance, incorporate it one to three times weekly depending on damage level.

Yes. The peptide technology targets bond repair across textures—fine, thick, curly, or chemically treated. Results vary with starting damage and porosity, but most clients notice improved strength, elasticity, and manageability.

Many clients notice softer, stronger hair and reduced breakage after the first salon service. Continued use over weeks enhances bond repair and long-term resilience, especially when paired with recommended maintenance products.

Yes. It pairs well with color services, deep conditioners, and K18 leave-in peptide products. Inform your stylist about recent chemical services so they can sequence treatments correctly to maximize bond-repair benefits.