Will Mascara Melt in the Sun? [Yes, but…]

woman sits on a windowsill and holds a cup of tea
  • Mascara can go bad in the heat, especially if it’s exposed to high temperatures or strong sunlight
  • You can prevent your makeup from melting by using less makeup in the summer, opting for longwear products, and priming your face
  • If your mascara gets too hot, it may start to grow bacteria, so it’s best to replace it every three months

I was so excited to buy my new mascara from Sephora. It was a bit more expensive than I usually spend on mascara, but I thought it was worth it. I couldn’t wait to try it out.

I didn’t realize until later that I had left it on the dashboard of my car when I went to work. It was a hot day and the sun was shining right on the bottle. I did some reading online and realized that heat can ruin makeup and even promote gross bacterial growth.

I was so disappointed. I had wanted to use it for my upcoming vacation, but now it was ruined. I didn’t know what to do. I figured I’d throw it out because there was no way I could use it now.

If you’re ever thinking about buying expensive makeup, be sure to keep it in a cool, dry place! If you accidentally leave it in the heat, it could be ruined beyond repair.


Will mascara melt in the sun?

At extreme temperatures, mascara will start to melt and lose its adhesive properties. The temperature required to cause this melting is approximately 140 degrees Fahrenheit.

Mascara with a wax-based formula is more prone to melting than water-based formulas. A number of factors affect how fast the mascara will melt including the formulation, exposure time, and ambient temperature.

In this article, you will learn how to avoid mascara melting.

Tips on How to Avoid Mascara Melting

Buy waterproof mascara

Water-based formulas are less likely to melt in the sun. The water-based formulas will also hold their color better and give you a longer-lasting and more vibrant look.

This is because they will not absorb as much of the oils from your eye area causing your eyelashes to have a longer-lasting effect.

Never leave mascara in your car

Leaving mascara in your car during the summer or on a warm day can cause it to melt. Ensure that you check where you store your makeup before leaving it anywhere for an extended period of time.

This is especially true for those with sensitive skin or is prone to breaking out because of the products they use. The oil from your skin can weaken the adhesive properties of the mascara.

The oil, when combined with environmental factors can cause it to eventually melt.

Apply mascara at room temperature

Hot temperatures will not only weaken the formula but will also cause mascara to melt. Storing your mascara in a warm place or in an area that is hot will cause it to lose some of its adhesive properties.

Never apply mascara if you feel that your hands are too warm. Always let your hands return to room temperature and check the temperature of your mascara before applying.

Thoroughly clean your eyelashes

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One of the most common causes of melted mascara is not thoroughly cleaning your eyelashes after removal from the previous use.

When there are still remnants of the previous mascara product left on your lashes, it can cause your individual eyelashes to stick together which can prevent them from stretching out fully.

The more thoroughly you clean your eyelashes before applying the new product will prevent this from occurring.

Don’t apply mascara during an extreme heat wave

Extended exposure to these types of temperatures will weaken the adhesive properties of your mascara and cause it to melt quicker than normal.

You should also avoid applying your mascara when you first wake up or before bed, or when you go to sleep.

Avoid overapplying

If you apply too much product, it will cause the formula to become thinner and more prone to melting. The formula is so strong that it can overcome your individual lashes if applied too thickly causing them to stick together.

The formula of the mascara will slowly absorb your natural oils and make it weaken, ultimately causing it to melt.

Don’t use expired mascara

black mascara
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When you buy your makeup, try to keep it as long as possible. Storing the products safely away from heat, moisture, and direct sunlight will prevent them from causing harm to your skin and making them harder to remove.

Make sure that you check the label before using an old makeup product on your eyelashes. Also, by using too much mascara, or if the formula is faulty, you can make it harder to remove.

Don’t apply mascara too close to your eyes

By applying your mascara too close to your eyes, you may experience the mascara melting. The heat from your eyes will cause the formula to lose its adhesive properties and make it melt faster than normal.

You should also apply mascara about 10 cm away from your eye.

If you want to keep your mascara on for longer, then try to avoid creating as many problems for yourself. Never leaving it in your car or in direct sunlight will help you avoid the melting process.

By following these tips, you can makeyour mascara last longer and give you the look that you want.