You just got a keratin treatment, and your hair feels incredible. Smooth, shiny, manageable. Now you’re wondering if you can book a color appointment without ruining everything you just paid for.
Or maybe you’re planning both services and trying to figure out the right order. Do you color first and then keratin? Or keratin first and then color? Does it even matter?
It does matter. The timing and order affect how long both services last, how your hair holds up, and whether you get the results you’re expecting.
The Short Answer
Yes, you can color your hair after a keratin treatment, but wait at least 2 weeks. Coloring too soon can compromise the keratin coating and shorten how long your smoothing results last. If you’re planning both services, the ideal order is color first, keratin second. The keratin treatment seals the cuticle after coloring, which actually helps lock in your color and extend its vibrancy. If your color needs to come after the keratin, the 2-week waiting period gives the treatment time to fully bond before the color process opens the cuticle again.
Why Timing Matters
A keratin treatment works by infusing protein into your hair shaft and sealing the cuticle with heat. That sealed cuticle is what gives you the smooth, frizz-free result.
Hair color (especially permanent color) works by opening the cuticle to deposit pigment inside the strand. If you color too soon after a keratin treatment, the color process reopens the cuticle that the keratin just sealed. This can strip away some of the smoothing results and shorten how long the treatment lasts.
Two weeks gives the keratin coating enough time to fully bond and stabilize. After that window, the treatment is locked in enough to handle a color service without significant loss.
The Best Order: Color First, Then Keratin
If you have the flexibility to schedule both services in the right order, color first is almost always the better approach.
Why this order works:
Your colorist applies color to clean, uncoated hair. The cuticle is open and ready to accept pigment, so the color deposits evenly and accurately. Your colorist can see exactly how the color develops without a keratin barrier affecting absorption.
Then, when the keratin treatment goes on 1-2 weeks later, it seals that freshly colored cuticle shut. The result is color that stays vibrant longer because the keratin is literally locking the pigment inside.
This is especially beneficial for clients getting balayage, highlights, or any lightening service. Bleach and lightener open the cuticle aggressively. Following up with a keratin treatment smooths and seals everything, which helps prevent the brassiness and dullness that typically shows up a few weeks after highlighting.
Scheduling tip: Book your color appointment first. Wait about 7-10 days. Then book the keratin treatment. This gives the color time to settle and any residual chemical processing to finish before the keratin seals it in.
When You Need Color After Keratin
Sometimes the timing doesn’t work out, and you need to color after your keratin treatment. That’s fine. Just follow these guidelines.
Wait at least 2 weeks. This is the minimum. Some stylists recommend waiting 3 weeks, depending on the keratin formula used. At Numi, our stylists will give you a specific timeline based on whether you got a Brazilian blowout, Lasio Keratin, or Magic Sleek.
Use ammonia-free color when possible. INOA ammonia-free color is gentler on the cuticle than traditional formulas. It deposits color using an oil-based system instead of ammonia, which means less disruption to the keratin coating. This is what we use for most single-process services at Numi.
Expect some keratin reduction. Even with proper timing, coloring after keratin will remove some of the smoothing effect, typically around 10-20%. You may notice slightly more frizz in the weeks after coloring compared to right after your keratin appointment. A glaze treatment after coloring can help reseal the cuticle and restore some of that smoothness.
Skip box dye. If you’re going to color after a keratin treatment, do it at a salon. Box dyes use harsher chemicals and one-size-fits-all formulas that can strip your keratin more aggressively than professional color. Your stylist can adjust the formula strength and processing time to minimize keratin loss.
What About Touch-Ups and Root Color?
Root touch-ups are the easiest color service to pair with keratin because the color is only applied to the regrowth, not the treated lengths. The keratin on your mid-lengths and ends stays intact because the color isn’t touching it.
If you’re a regular single-process color client who also gets keratin treatments, here’s a typical schedule that works well:
Month 1: Get your keratin treatment.
Month 2: Root touch-up only (color on regrowth, leave the keratin-treated lengths alone).
Month 3-4: Full color service if needed, then rebook keratin shortly after to reseal.
Your stylist can build a rotating schedule that keeps both your color and your keratin looking fresh without over-processing your hair.
Does Keratin Make Color Fade Faster?
No. It’s actually the opposite. A keratin treatment can help your color last longer because the sealed cuticle holds pigment more effectively. Clients who get keratin treatments after coloring often report that their color stays vibrant weeks longer than usual.
The caveat is that if you use a clarifying shampoo before your keratin treatment (which is standard because it opens the cuticle so the keratin can penetrate), some color may lift during that step. If you just colored your hair, mention this to your stylist so they can use a gentler pre-treatment wash.
After both services, stick with sulfate-free shampoo. This protects both the keratin and the color. Every product line we carry at Numi, including Kerastase, Olaplex, Oribe, are sulfate-free.
Can You Bleach or Highlight After Keratin?
Yes, but this is where you need the most caution. Bleach and lightener are the most aggressive chemical processes, and they will remove more of the keratin coating than regular color.
If highlights or balayage are part of your routine, the best approach is:
Get highlights first. Wait 7-10 days. Then get the keratin treatment to seal everything.
If you must highlight after keratin, wait at least 3 weeks, and know that the highlighted sections will lose some smoothing effect. Your stylist can add an Olaplex treatment during the highlighting process to minimize bond damage, and a glaze afterward to tone and reseal the cuticle.
Talk to Your Stylist Before Booking Both
The safest approach is to mention both services when you book your first appointment. Your stylist will build a timeline that accounts for your hair’s current condition, the keratin formula being used, and the type of color service you want.
At Numi, many of our clients get both color and keratin regularly. Our color and keratin specialists coordinate these services all the time and know exactly how to sequence them for the best result with the least compromise.
Book Your Color and Keratin Appointments at Numi Hair
Whether you’re scheduling color before keratin, keratin before color, or trying to figure out the right plan for both, our team will build a timeline that protects your investment in both services.
Why clients trust Numi Hair:
- Named Best Hair Salon in Westchester and a Top 100 Salon in the US
- 993+ Google reviews at 4.9 stars
- Our colorists use INOA ammonia-free color, which is gentler on keratin-treated hair
Book your appointment online or call us at (914) 574-6402. We’re located in Scarsdale, just off the Bronx River Parkway, easily accessible from White Plains, Eastchester, Bronxville, New Rochelle, and all of Westchester County.
Frequently Asked Questions
How long after a keratin treatment can I color my hair?
Wait at least 2 weeks. Some formulas may require 3 weeks. Your stylist will give you a specific timeline based on which keratin treatment you received. Coloring too soon can strip the smoothing results and shorten how long the treatment lasts.
Should I color before or after a keratin treatment?
Color first, then keratin is the ideal order. The keratin seals the cuticle after coloring, which locks in pigment and helps the color last longer. If you need to color after keratin, wait 2+ weeks and use an ammonia-free formula like INOA for less cuticle disruption.
Will a keratin treatment change my hair color?
A keratin treatment can slightly lighten or warm up your color because of the high heat used during the sealing step. The change is usually subtle, maybe a half-shade lighter or warmer. If you’re concerned, mention this to your stylist so they can adjust the flat iron temperature or recommend doing a color refresh afterward.
Can I get highlights and a keratin treatment at the same appointment?
It’s possible, but not ideal. Most stylists recommend spacing them at least 7-10 days apart. Doing both in one sitting means your hair goes through coloring chemicals and high-heat keratin sealing back-to-back, which increases the risk of damage. Separating them gives your hair a recovery window.
Does keratin treatment make hair color last longer?
Yes. Because a keratin treatment seals the cuticle, it helps trap color pigment inside the hair shaft. Many clients notice their hair color lasts significantly longer when paired with a keratin treatment, especially for services like balayage and highlights that are prone to brassiness over time.
Numi Hair Salon is located at 69 Harney Road, Scarsdale, NY 10583, just off the Bronx River Parkway. We serve clients from White Plains, New Rochelle, Eastchester, Bronxville, Hartsdale, and throughout Westchester County.
