i just went outside with ISO-HEET . full strength on my cleaning patch. i dropped a match on it. it burned real fast.i them mixed 50/50 iso-heet with windex and i could not get the patch to burn,it would not catch. i would not have this ISO-HEET anywhere around fire,heat or gunpowder .alcohol in its full state is VERY BURNABLE. to much risk to use around muzzleloader ,i think.