Patch compounds

Patch compounds are usually used only at the edge of the crucible and in the spout area. They are also referred to as patching compounds, applied in accordance with the processing instructions. Since these compounds contain at least 5% water, they can also be sprayed on using suitable equipment. After an air-drying period, they must also be dried with a gas flame, to prevent the compounds from flaking off on contact with the molten metal.