Can I put NicoBloc on all 20 cigarettes in a pack at one time?

NicoBloc has to be applied to your cigarette just before you smoke it. NicoBloc is active for about 15 minutes after applying it to your cigarette after which it dries out and makes the cigarette difficult to smoke. The job of NicoBloc is to block tar & nicotine from the cigarette smoke.