According to Cosmetics Cop by Paula Begoun, there's scientific evidence and reasoning that shows that silicones do not suffocate skin or clog pores:
"... the molecular structure of commonly used silicones makes it impossible for them to suffocate skin. The unique molecular structure of silicones (larger molecules with wider spaces between each molecule) allow them to form a breathable barrier and also explains why silicones rarely feel heavy or occlusive, although they offer protection against moisture loss (Source: The Chemistry and Manufacture of Cosmetics, Volume 3, Book 2, Allured Publishing Corporation, 2002, pages 833-839).
Furthermore, "silicone fillers are sometimes used for improving the appearance of acne scars. That certainly wouldn't be the case if silicone was a pore-clogging ingredient (Source: Dermatology Research and Practice, October 2010, Epublication). Perhaps the most telling reason why silicones do not clog pores and cause acne (or blackheads) is because, from a chemistry standpoint, most silicones are volatile substances. That means their initially viscous (thick) texture evaporates quickly and does not penetrate the pore lining where acne is formed."
Interestingly, on her Facebook page for her line of products Paula's Choice, she responds to a fan who gets cysts shortly after she uses products with silicones. Here's a really interesting quote from Paula's reply:
"It is a fact that silicone doesn't clog pores because silicone isn't occlusive (just the opposite), and there is no research showing it to cause breakouts, neither mild nor cystic... However, just because there isn't research doesn't mean a problem doesn't exist for some people."
She also continues:
"Having said that, I'd advise you to stay away from silicones... When it comes to acne, it takes experimenting to see what works—even I'm surprised by what my skin likes and doesn't like! The major thing is to only use products that have great ingredients and no irritants; never compromise on that."
Shoot and discuss.



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