Casting trials have shown Itochu Ceratech Cerabeads 60 sand to be a successful substitute for zircon sand in many cases, but not 100% of the time. A new product from Itochu Ceratech, Cerabeads 70, has proven to be a more universal solution as a zircon snd substitute. A zircon flour substitute of alumina and alumino-silicates has been developed and tried in production tests. This slurry in combination with Cerabeads 70 has proven to be successful in replacing zircon in prime layers. Casting trials are presented.