Technically yes, Static Cling does “cling” on both sides, meaning that it can be installed on either side of a window. With the standard, outside glass production method for clear and regular cling, there is less cling material exposed on the front side of the cling due to the printing on that side.
If you plan on installing your static cling inside your window facing out, we highly recommend adding the “Inside Glass” option. This ensures that the cling has a better hold if applying on the inside facing out. The inside glass option has a protective barrier that prevents ink from sticking to the glass or coming off when the cling is removed, but will only cling on one side.