Which keratin treatment lasts the longest?
Finally, Nano Smooth is the strongest and longest process. It requires at least two hours and includes hair being shampooed twice, then left on before the hair is blow-dried and straightened. It's worth the wait as it lasts three to four months and provides the best results on stubborn, frizzy hair.”Jul 24, 2019
Finally, Nano Smooth is the strongest and longest process. It requires at least two hours and includes hair being shampooed twice, then left on before the hair is blow-dried and straightened. It's worth the wait as it lasts three to four months and provides the best results on stubborn, frizzy hair.”Jul 24, 2019