Can you still use sunscreen if there is water when you squeeze it out? Why does sunscreen turn into water?

Theoretically, sunscreen should be applied all year round, but many people may only apply it in the summer, which results in unused sunscreen. After leaving it for a year, when you take it out and use it the next year, you will find that there is water squeezed out. So, can the sunscreen still be used if there is water squeezed out?

Can I still use sunscreen if there is water when I squeeze it out?

As long as you make sure that the sunscreen is still within the shelf life, you can generally use it. Remember to shake it evenly before use and you can use it normally. You can determine whether the sunscreen is expired by observing its viscosity, whether it is crystallized, and whether it is stratified. Because sunscreen contains some chemical ingredients, it cannot be used once it expires.

Why does sunscreen turn into water?

It is normal for sunscreen products to experience a small amount of oil-water separation. The “water” mentioned here is actually sunscreen, which is a type of oil. You can tell it’s oil when you drop it on your skin. Because sunscreens are oily and insoluble in water, emulsifiers and stabilizers are added to ensure that the paste is mixed evenly. But this does not completely stabilize the paste. If it is left standing for too long, separation will occur. As long as the sunscreen is used within the shelf life, it is safe. Just shake it vigorously before each use and you will be fine.

How long is the shelf life of sunscreen?

There are many types of sunscreen, so the shelf life of sunscreen varies according to the situation of each brand. Generally, the shelf life of unopened sunscreen is three years, and some sunscreens can last up to five years. The shelf life of sunscreen is usually marked on the bottle, and the production and date are visible.

How long is the shelf life of sunscreen after opening?

Although the shelf life of sunscreen is 3-5 years, the shelf life of sunscreen after opening is only half a year to one year. After the sunscreen is opened, the sunscreen in it will oxidize over time. Once the sunscreen in sunscreen is oxidized by air, the sun protection effect of the sunscreen will be greatly reduced or ineffective. This can easily cause your skin to get sunburned, reddened, and tanned under the sun. Therefore, sunscreen should be used up as soon as possible after opening and should be stored away from sunlight to prevent deterioration due to high temperature.