This revolutionary new product has impressed us with its effectiveness. Heavily fouled barrels come clean in a very short time – with no destructive brushing and no pitting. Simply run a patch heavily soaked with Wipe-Out through your gun’s barrel and let it sit for 20 minutes, then run a clean patch through the bore. Powder fowling will show on the patch as grayish black, Copper fouling will be a deep navy blue, Carbon will be tan to brown in color. Apply again and let sit for 10 minutes. Another clean patch thru will show if any traces of fouling remain – if so re-apply until a patch comes through clean. Though Patch-Out contains no acids or ammonia, it will dissolve brass, bronze, and copper, and will degrade lead so it can be pushed out with a patch. It cannot cause rust, will not gum or form solids in either the action or the barrel, and is safe for all barrel steels – both carbon and stainless. 8 Fluid Ounces – made in the U.S.A.