Traditions� new BlackOut 209� is an advanced formula that helps clean fouling from your muzzleloader when using BlackHorn 209 Powder. The all-in-one oil based cleaner helps reduce fouling and treats the barrel to help protect against rust. - This bore solvent is an all-in-one oil based cleaner which helps reduce fouling protects against rust and provides easy loading when using Blackhorn 209 powder. Soak your patch in this bore solvent and swab your barrel to remove fouling.