You are currently viewing How Long Can Hair Dye Sit Out After Mixed?
At the hairdresser � woman gets new hair colour; close-up on strand of hair; Shutterstock ID 71791408; PO: angelikiJ-for Jordan Muto

How Long Can Hair Dye Sit Out After Mixed?

  • Post category:Hair
  • Post last modified:October 25, 2022
  • Reading time:4 mins read

When you mix hair dye, the clock starts ticking. You have about 45 minutes before the dye degrades and becomes unusable. After that, it’s a waste of time and money to use it.

But what if you’re not ready to use it right away? Can you save mixed hair dye for later?

5 Don’ts after hair color

Hair dye can last for quite a while after being mixed together. However, it is always best to use it as soon as possible for the best results. If you do need to store it, make sure to keep it in a cool, dark place and use it within six months.

Can You Use Mixed Hair Dye the Next Day

Most hair dyes will recommend that you wait at least 24 hours before shampooing your hair after dyeing it. This gives the color time to set and prevents it from washing out too quickly. However, some dyes can be used immediately after they are applied.

If you are using a semi-permanent or temporary hair dye, it is generally safe to shampoo your hair right away. These types of dyes do not penetrate the hair shaft as deeply as permanent dyes, so they are less likely to cause irritation if they are not left on for the recommended amount of time. If you are using a permanent hair dye, it is best to wait at least 24 hours before shampooing your hair.

Permanent dyes contain chemicals that can cause irritation if they are not given enough time to set in the hair. In some cases, waiting 48 hours may be necessary to avoid any discomfort.

How Long Can Hair Dye Sit Out After Mixed?


-How Long Can Hair Dye Sit Out After Mixed

When it comes to hair dye, you always want to err on the side of caution. Once mixed, hair dye can start to degrade and become less effective. That’s why it’s important to use mixed hair dye as soon as possible.

Generally speaking, you have about 48 hours after mixing before the quality of the hair dye starts to deteriorate.


If you’ve ever mixed hair dye and then wondered how long you can leave it out before using it, this post is for you. According to experts, hair dye that has been mixed and left out can be used for up to four hours. After that, the quality of the dye begins to degrade and it’s no longer as effective.

So if you’re mixing your own hair color, or even just trying a new brand, make sure to use it within four hours for best results.