Method for preparing silicone mold tooling

A method for preparing silicone molding tooling of a shaped article, comprising the steps of:

• providing a curable silicone resin composition having at least two parts that, upon mixing, cure to form a silicone rubber;
• mixing the parts of the silicone resin composition to form an uncured silicone rubber having a viscosity between about one million centipoise and about four million centipoise and having the ability to hang on a vertical surface in a layer of about 0.2 cm thickness without significant slumping, said mixing being accomplished in such a manner that entrainment of air in said uncured silicone rubber is avoided;
• spraying the uncured silicone rubber onto a surface to be molded in a single operation with said mixing step, said spraying being done in such a manner that entrainment of air in said uncured silicone rubber is avoided, wherein said layer is at least about 0.1 cm thick;
• and
• allowing said silicone rubber to cure on said surface to form a mold of said surface.