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How Long Does Demi-Permanent Hair Dye Last?

If you dye your hair often, you probably already know the difference between semi-permanent and permanent, but what does demi-permanent hair dye mean? How long does demi-permanent hair dye last?

What Is Demi-Permanent Hair Dye?

demi permanent dye
Demi-Permanent Hair Dye, hoyuprofessionalmy/Instagram

Like many types of temporary hair dye, demi-permanent hair dye uses a solution that does not contain ammonia. However, demi-permanent hair dyes also contain a low-volume developer, which allows the color to soak into the hair cuticle better than other semi-permanent hair dyes, making the color hold much longer. 

Unlike permanent hair dyes, demi-permanent dyes do not penetrate the hair shaft. Instead, demi-permanent dye deposits color pigments on the top surface layer of your hair, meaning that, like other temporary hair dyes, it fades a little bit with every wash.

How Long Does Demi-Permanent Hair Dye Last?

Demi-permanent dye is a terrific choice if you want your color to last longer than only a few weeks and fade out from there. Semi-permanent dyes typically last between 4 to 6 weeks (10-12 washes).

However, demi-permanent hair dye can last for about 6 to 12 weeks (12-25 washes), which makes them a fantastic option if you want to play around and experiment with colors without having them fade too quickly or wait too long between dyes.

How to Make Demi-Permanent Hair Dye Last Longer

Although demi-permanent hair dye will eventually wash out, there are several things you can do in your daily hair care to make your color last as long as possible.

1. Wait 24-72 Hours After Dying to Wash Your Hair

ways to make demi permanent hair dye last longer

Since demi-permanent and other temporary hair dyes fade with hair washes, waiting a few days to wash your hair gives your cuticles more time to lock in the pigments, allowing for a brighter, more vibrant, and longer-lasting color. 

2. Avoid Washing Your Hair Daily

Many people avoid daily hair washes for some reason or another. When trying to maintain a vibrant color, you should minimize how frequently you wash your hair. Washing your hair too often will make your color fade and become dull much faster. 

Alternatively, you can use a dry shampoo for those days in between washes to soak up excess oil and leave your hair feeling fresh and vibrant.

3. Use Products Made for Colored Hair

Switching up your hair care products can help dramatically in the longevity of your color. Many shampoos and conditioners contain ingredients that strip color for hair. Switching to products made for colored hair will prevent your color from fading fast.

4. Avoid Using Heat for Styling

avoid using heat styling product on demi permanent hair

Avoiding heat for styling can be a tricky one. However, your color will thank you. Using heat on dyed hair can cause the dye to fade much faster. There are plenty of ways to style your hair without using heat.

Alternatively, if you can’t avoid using heat, use a heat-protecting serum to avoid damaging your hair or color.

5. Avoid Direct Sun Exposure

Direct sun exposure can be harmful to us in many ways, including damaging our hair. It is best to avoid direct sun exposure to your colored hair if you want to prolong the vibrancy. The sun can cause your color to fade faster and damage the hair cuticles. 

6. Wash with Cool or Cold Water

washing demi permanent dyed hair with cold water

As we know, heat can make your color fade faster, which is why rinsing your hair with cold water can improve the longevity of your hair color.

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