Does Cyclomethicone / Cyclopentasiloxane Clog Pores?

Based on formulation expertise and product information, Cyclomethicone / Cyclopentasiloxane (such as the product with INCI name Cyclopentasiloxane) generally does not clog pores. It is a lightweight silicone that evaporates quickly and is often used in cosmetic formulas, including sunscreens, to provide a non-sticky, silky-smooth feel and help improve the texture of the product.

It's important to note that while it doesn't typically clog pores, in some individuals, it might cause skin irritation. This irritation can sometimes lead to breakouts like clogged pores or rashes, which might be mistakenly attributed to the ingredient clogging pores directly. The actual cause in such cases is the skin's reaction to the ingredient.

Therefore, when used appropriately in formulations, Cyclomethicone / Cyclopentasiloxane is generally considered suitable for use in products like sunscreen without causing pore blockage. However, as with any ingredient, individual skin sensitivity can vary.