Is it better to have a waterproof sunscreen or a non-waterproof sunscreen? How to tell if a sunscreen is waterproof?

Sunscreen is a must-have skin care product under the scorching sun in summer. Many people worry that sunscreen will be washed away by sweat. Is this idea unnecessary? Is sunscreen waterproof? Also, is it better to have a waterproof sunscreen or a non-waterproof one?

Is it better to have waterproof or non-waterproof sunscreen?

Each has its pros and cons. Waterproof sunscreen is not easily affected by sweat and water, will not fall off under the impact of sweat and water, has a long-lasting sun protection effect. However, this waterproof sunscreen contains many chemical ingredients, which are very irritating to the skin. Non-waterproof sunscreens contain relatively fewer chemical ingredients, so they cause less damage and irritation to the skin. However, the sunscreen will easily come off once you sweat or come into contact with water, so the sun protection effect will be affected. Therefore, both have their own advantages. Waterproof sunscreen has better sun protection effect, while non-waterproof sunscreen has a longer-lasting sun protection effect. Each has its pros and cons. The key is to choose a sunscreen product that suits you according to your own situation.

Is sunscreen waterproof?

Not all sunscreens are water resistant. Most of the current sunscreens have an oil-in-water or oil-in-water molecular structure. Products with an oil-in-water molecular structure are usually called waterproof, but their disadvantage is that they feel bad when used and are sticky and not breathable; products with an oil-in-water molecular structure are refreshing, but the waterproof effect is not good. Currently, there are two types of sunscreen products on the market: one is physical sunscreen and the other is chemical sunscreen. Physical sunscreen uses the principle of refraction to protect against the sun, while chemical sunscreen uses ultraviolet absorbers to absorb ultraviolet rays to achieve the purpose of sun protection. The SPF1 of sunscreen means that it can protect against the sun for 15 minutes. For example, a sunscreen with SPF20 can protect against the sun for 15 minutes multiplied by 20 = 300 minutes, which is 5 hours. If you do strenuous exercise or swimming, you need to reapply it every 2-3 hours.

How to tell if your sunscreen is water resistant

Apply sunscreen on your hands and then pour water on them after three minutes. If the hands are shaped like water droplets on a lotus leaf, with each drop of water clearly visible, then this is a waterproof sunscreen. If water flows on your hands, it is not a waterproof sunscreen. Waterproof sunscreen is difficult to wash off, so how do you clean it? After cleaning, pour toner on the cotton pad, wipe it from top to bottom along the skin texture, and carefully observe whether there is any residue on the cotton pad. If there is no residue, it proves that it has been cleaned. You can then use eye cream, essence, face cream, etc.

Do I need to remove makeup if I don't have waterproof sunscreen?

need. Although non-waterproof sunscreen will easily fall off when it comes into contact with water, if you apply sunscreen, you must remove your makeup before going to bed at night. Because sunscreen contains many chemical ingredients, and some of them are insoluble in water, it is impossible to completely clean it directly with water or facial cleanser. It is recommended to use special makeup remover products to remove makeup. If the skin is not cleaned thoroughly, the chemical residues in the sunscreen will remain in the pores and clog them, causing a series of skin problems.