1. Diasilite

The diatomaceous earth, when utilized, accomplishes three functions :

  • It increases the thermal impedance of the mold coating to prevent the development of localized chills in the poured molten metal charge.
  • It allows easy stripping or removal of the coating from the mold following the casting operation.
  • It acts as an inert binder when the coating is applied to the mold.

Calcined Diatomaceous gives maximum volume stability which prevents swelling during the heating cycles.