Frequently Asked Questions

Get answers to common questions about K18 leave in treatment 0.5.

K18 begins repairing molecular bonds immediately and completes visible restorative effects in about four minutes during application. Improvements in strength, elasticity and softness are noticeable after treatment, with continued benefits over subsequent washes as bonds remain rebuilt.

Yes. K18 is safe and formulated for color-treated hair; it restores broken bonds without affecting color molecules. Your stylist can apply it after chemical services to rebuild structure and maintain vibrancy, making it ideal for colored, lightened, or highlighted hair.

Frequency depends on damage level: salon application can be used as needed, often every 4–6 weeks. At-home K18 protocols may recommend treatments every few washes initially, then monthly maintenance to preserve repaired bond integrity and elasticity.

K18 repairs internal bonds and improves appearance but cannot permanently fuse physically split ends. Regular trims are still recommended; K18 will strengthen and reduce further splitting, making hair healthier and delaying recurrence between cuts.

Absolutely. K18 is especially effective on chemically treated hair—bleached, permed, or relaxed—by rebuilding peptide bonds damaged during processing. It restores elasticity and strength, helping hair recover from chemical trauma when used appropriately.

No rinsing required. K18 is a leave-in molecular repair mask: apply to towel-dried hair, wait four minutes for the peptide to penetrate, then style as usual. Do not shampoo immediately to allow bond rebuilding.