This non-flammable, odorless ceramic coating prevents oxidation and scale. Eliminates need for flux or pickle. Protects gemstones form heat oxidation. Firescoff® Rh allows the soldering of rhodium and gold filled metals without damage to the plated layer. It protects rhodium from turning black. Allows longer working time at higher temperature, with warm water cleanup that eliminates the need for an acid pickle pot solution. FIRESCOFF comes in 4oz bottle, and FIRESCOFF Rh in 125ml bottle.