Also see graphic and lettering . In Hindu temples of Vishnu , the tower above the shrine. Silica ground into a granular form is a component of glass and ceramic bodies , cement and abrasives , and, further refined as silicon, in computer chips. Also see art conservation , clay , climate control , relative humidity , sand , and silicone rubber . It is mixed from a rubber based solution and a catalyst .
Silicone rubber is used for small scale casting .
As a gel, silicone is available in tubes from any hardware store. The transparent kind is preferable because it permits the sculptor to see air bubbles. If a thick mass is needed, it is best applied in coats . While silicone's surface can cure rapidly, if too thick a coat is made at once, the interior will not cure in a acceptable time . Many such products are hazardous .