How It Works: A stylist applies a keratin hair-straightening product to your hair and then uses the heat of a flat iron to seal it in. The process takes about 90 minutes or longer, depending on your hair’s length.
Time-Saving Tresses: If you usually style your hair straight, a keratin hair-straightening treatment could shorten your blow-dry time by 40% to 60%.
Farewell, Frizz: You can forget about frizzy hair after treatment. You could walk out in moist or light rain and your hair won’t change.
Wait Before You Wash: You shouldn’t wash your hair for three or four days after getting the treatment. That’s because the solution takes time to work.
Upkeep: After you get a keratin hair treatment, and after the don’t-wash waiting period, you should use sodium-sulfate-free shampoo to help maintain the treatment.
How Long It Lasts: Expect the results to last two to 2 1/2 months.