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 a variety of manufacturers:

Chavant

• NSP: https://chavant.com/chavant-nsp
• Alien Clay: https://chavant.com/alien-clay
• Sculptex: https://www.reynoldsam.com/product/sculptex/
• Jolly King: https://chavant.com/jolly-king
• Clayette: https://chavant.com/clayette
• Additional non-sulfur modeling compounds available here: https://chavant.com/fine-art-sculpting-clays

Van Aken

• Protolina: https://www.vanaken.com/collections/non-hardening-modeling-clay/products/1-lb-natural-protolina™-non-hardening-clay-for-prototyping-various-styles
• Plastilina: https://www.vanaken.com/collections/non-hardening-modeling-clay/products/1-lb-plastalina™-non-hardening-modeling-clay-various-colors-plastalina™-non-hardening-modeling-clay

Sculpey (must be oven-cured first)

• Original Sculpey: https://www.sculpey.com/products/original-sculpey
• Super Sculpey: https://www.sculpey.com/products/polymer-clay/super-sculpey

Monster Makers

• Monster Clay: https://www.monstermakers.com/monster-clay/

IMPORTANT: Although these clays are advertised as sulfur-free, a surface compatibility test is always recommended to determine the suitability of any mold making rubber compound. Learn more about how to do a compatibility test. This list is intended as a guide and not a guarantee against cure inhibition.