Makeup effect and pore clogging with trimethylsiloxysilicate

Ingredients used in foundations

Trimethylsiloxysilicate is a silicone polymer that is widely used in skin care and makeup cosmetics.

It is one of the ingredients known as silicone oil, and its main effect is to create an artificial film on the surface of the skin, providing a film-forming and long-lasting barrier effect.
It is an ingredient that is particularly commonly used in foundations, sunscreens, makeup bases, and makeup-keeping products.

Related article: Why you should choose silicone-free skin care

Origin and History of Trimethylsiloxysilicate

Trimethylsiloxysilicate is synthesized from silicone resin and a substance called trimethylsiloxane.

Silicone polymers were first used for medical and industrial purposes, but began to be used in cosmetics in the 1940s, and trimethylsiloxysilicate also became widely used around this time through the 1950s.

Since then, it has been used for many years in the cosmetics industry as an ingredient that protects the skin and gives a smooth feel when used.

Effects of trimethylsiloxysilicate in cosmetics

The greatest feature of trimethylsiloxysilicate is its film-forming effect.

In other words, it works by creating an artificial thin film like plastic wrap on the surface of the skin. This is also known as the "film-forming effect."

Some people may think that it's a film on the surface of the skin. But in fact, it is a function used in many foundations. For example, you can expect the following effects.

1. Makeup lasts longer

Trimethylsiloxysilicate helps make-up last for long periods of time.

2. Waterproof effect

Its water and sweat resistant properties prevent your makeup from coming off when you're at the beach or exercising.

3. Supports the skin's barrier function

A waterproof film coats the skin, protecting it from external stimuli (pollutants, pollen, UV rays, etc.).

Effects other than creating artificial film

In addition, the addition of trimethylsiloxysilicate is expected to have the following effects:

Smooth finish

Among silicone oils, trimethylsiloxysilicate is a highly volatile silicone. Being highly volatile means that it evaporates easily. This means that it has a light feel that doesn't remain sticky on the skin, and makes makeup and other products go on smoothly.

The foundation won't crack

The film created by trimethylsiloxysilicate is characterized by its softness. It flexibly adheres to the skin in accordance with facial movements, so the problem of the foundation cracking when you smile is less likely to occur.
It also prevents wrinkles and crumbling.

Does trimethylsiloxysilicate cause clogged pores?

Trimethylsiloxysilicate is generally considered a safe ingredient .
However, because it has a strong ability to form a film on the skin surface, there are some concerns, such as:

Sebum gets clogged

The film made by trimethylsiloxysilicate repels sweat and water. It is highly waterproof and adheres tightly to the skin, but at the same time, sebum and sweat get trapped inside.
As a result, sebum may be more likely to clog your pores.

Acne and pimples

Especially when it is combined with oily creams or foundations, the sebum and excess oil remain in contact with the pores for a long time, which can cause acne and breakouts.

Silicone oil itself is generally considered to be "non-comedogenic" (not likely to clog pores).

However, what's scary is leaving some stains unwashed.

Even if you think you have removed your makeup, it tends to remain on your skin. People with oily or sensitive skin in particular may need to be careful as it can cause skin irritation.

Related article: Must-read for those concerned about pores! Recommended oils for each skin type

Cleansing is super important

Trimethylsiloxysilicate adheres strongly to the skin, so much so that it creates makeup that won't come off even with sweat or water. It also has properties that make it difficult to dissolve in water.

In other words, if you don't cleanse properly, there is a high possibility that it will remain on your skin. Excess dirt and oil will continue to adhere to your skin, leading to skin problems.

Be especially careful with waterproof cosmetics.

Remove your makeup by carefully blending in a cleansing agent that thoroughly removes silicone, such as an oil cleanser or cleansing balm.

Also, thorough cleansing can tend to dry out the skin, so don't forget to moisturize after removing it.

Related article: Are you choosing the right cleanser?

When using cosmetics that contain trimethylsiloxysilicate

Using trimethylsiloxysilicate has many benefits, including lasting makeup and waterproof properties.

Silicone is also an ingredient that causes almost no irritation to the skin, so it is used in many cosmetics as it can be used safely even by people with sensitive skin.

However, the trade-off is that it creates a strong film that can clog pores. Also, if you cleanse too much after use to avoid clogging your pores, it can actually cause dry skin .

It is important to understand the advantages and disadvantages of silicone-based ingredients, including trimethylsiloxysilicate, and to develop skin care products that are suited to your skin.