What type of clay should I use?

If you are making a mold and need to use clay for an original model or creating mold walls, your best bet is to use non-sulfur based clay.

There are several non-sulfur based clays to choose from. Suppliers include:

Disclaimer
This FAQ article is offered as a guideline and offers possible solutions to problems encountered during mold making and casting. No warranty is implied and it is up to the end user to determine suitability for any specific application. Always refer to the provided Technical Bulletins (TB) & Safety Data Sheets (SDS) before using any material. A small scale test is suggested to determine suitability of any recommendation before trying on a larger scale for any application.