Ultra Materials UltraMud™.
Mineral-based. Non Toxic.
Mix UltraMud™ with water to create a really nice looking mud. UltraMud™ cracks when it dries. Great for aging costumes.
The bottom line
A finely ground mineral that, when added to water, results in an excellent mud consistency.
For a thick mud effect, mix about one part UltraMud™ with four parts water. Add tempra paint to obtain the desired color. Let cure for 2 hours. Dilute further to obtain desired consistency. For a soiled effect apply dry with a soft brush. WARNING: Do not inhale.