Liver of Sulfur Gel 2oz. Well-known as an excellent oxidizer for silver and other metals, Liver of Sulfur is easy-to-use when working with metal for craft projects. Each container of Liver of Sulfur Gel contains two (2) ounces of the solution in a non-drip form that works best when applied directly to the metal surface with a cotton swab. The Liver of Sulfur Gels durable finish ranges from light gray to black. Once dry, this solution-treated metal can easily be polished with a micro-abrasive polishing pad.