A stylist's guide to prepping hair before a keratin treatment: clarify, assess porosity, and section correctly for smoother, longer-lasting results.

Avoid the keratin treatment mistakes that cost salons results: skipped clarifying, wrong heat, bad sectioning, and weak aftercare advice.

Master sectioning and saturation for flawless, even keratin smoothing. Pro application tips to eliminate patchy results and frizzy regrowth.

Salon ventilation and chemical safety for keratin smoothing: airflow, PPE, and storage best practices, plus the formaldehyde-free alternative.

How keratin treatment rules differ across the US, EU, Canada & Brazil—and why formaldehyde-free formulas keep your salon compliant.