I don't like silicon anything on, or in my guns. That includes silicon gun socks, WD-40, or those silicon wipes.
I just leave a nice coat of rem-oil on my guns, and wipe it off and out of my gun when I want to shoot it. Any (gun) oil will work, and most motor oils, if all you are doing is keeping it rust free. I like rem-oil, simply because it is an aerosol.
Some stainless steels will rust, I don't know about that specific Sig, but I have seen stain "less" 10/22 barrels with a nice film of rust on them...
You don't need to really worry about those silicon wipes actually polishing anything that isn't supposed to be polished, it usually means that you can scrub some light dirt/grime off with the cloth.