The Inserts are cast using a 1600°C rated low cement castable. The low cement means they do not contain any lime or other substances that can react with other materials. It is basically an inert solid that does not chemically bond with other materials, even under very high heat. They are suitable to be used with any molten material up to 1600°C.
Warning always ensure inserts are dry before use !
2 sizes available to suit GCT pouring buckets.