Hair care · October 26, 2026
The first 72 hours decide how long a keratin treatment lasts. Here is when you can wash, tie your hair up, tuck it behind your ears, and get back to the gym.
For the first 72 hours after a keratin treatment, keep your hair dry, loose, and straight. Do not wash it, tie it up, clip it, or tuck it behind your ears, and avoid workouts that make you sweat. After that, use sulfate-free shampoo and wash less often. Always follow the timing your stylist gives you.
A keratin treatment is sealed into the hair with a flat iron, but it keeps setting for a few days after you leave the salon. Water, sweat, and pressure during that window can leave dents or shorten the life of your results.
Formulas differ. Some newer treatments allow washing after 24 hours, while others ask for three days. The product your stylist uses sets the rules, so ask before you leave the chair.
Not for the first 72 hours. Tucking hair behind your ears creates a bend that the treatment can set into, leaving a kink that can last until your next wash or longer.
Keep your hair loose and straight. If it falls in your face, smooth it back with your fingers instead of tucking it.
Skip ponytails, buns, braids, clips, headbands, and sunglasses on your head for the first 72 hours. Elastics and clips press a line into the hair while the treatment is still setting.
If you have to pull your hair back, use a loose silk scarf tied low at the nape. After the waiting period, choose soft scrunchies or spiral ties over tight elastics.
Avoid heavy sweating for the first 48 to 72 hours. Sweat is moisture, and moisture at the roots can make hair revert or dent before the treatment sets.
A gentle walk in cool weather is fine. Save hot yoga, long runs, and intense workouts until after your first wash. Skip saunas, steam rooms, and swimming in that window too.
With most formulas, wait 72 hours before the first shampoo. Keep your hair dry in the shower with a cap, and if it gets wet by accident, blow-dry it straight right away.
From the first wash onward, use a sulfate-free and sodium chloride-free shampoo and conditioner. Harsh cleansers strip the treatment faster.
Wash two or three times a week instead of every day. Rinse with fresh water after swimming in a pool or the ocean, since chlorine and salt break down the treatment.
Ask your stylist how long to wait before coloring, and sleep on a silk or satin pillowcase to cut friction. With good care, most treatments last about three to five months.
Smyrna summers are humid, and humidity is what makes untreated hair frizz. A keratin treatment booked in late spring can carry you through the stickiest months. If you book in summer, plan your 72-hour window around outdoor plans and stay in air conditioning when you can.
Swimming at Percy Priest Lake or a neighborhood pool? Wait until after your first wash, then rinse with fresh water as soon as you get out.
Some smoothing products release formaldehyde when heated. The FDA advises asking your stylist about the ingredients and watching for eye irritation, headaches, or breathing trouble during a treatment (FDA: hair smoothing products that release formaldehyde). OSHA also publishes guidance for salons using these products (OSHA: hair salons).
It is a fair question to ask at any salon. Cute Cuts at 569 S Lowry St offers keratin treatments, Brazilian straightening, and hair rebonding in Smyrna, starting at $100, for clients from Smyrna, La Vergne, and Murfreesboro.
Questions clients ask
Wait about 72 hours, or as long as your stylist advises. While the treatment is still setting, tucking hair behind your ears can press a bend into it that stays until your next wash. Keep hair loose and smooth it back with your fingers instead.
Avoid ponytails, buns, clips, and headbands for the first 72 hours, because elastics leave dents while the treatment sets. If you must pull hair back, tie a loose silk scarf low at the nape. After that, soft scrunchies are gentler than tight elastics.
Avoid heavy sweating for 48 to 72 hours. Sweat adds moisture at the roots, which can make freshly treated hair kink or revert. A light walk in cool weather is fine. Save intense workouts, hot yoga, saunas, and swimming until after your first wash.
Keep hair dry, loose, and straight for the first few days, then switch to sulfate-free shampoo and conditioner. Wash two or three times a week, rinse after pools or the ocean, and use a silk pillowcase. Good care helps most treatments last three to five months.