Best for: Food-safe applications (if certified), resin casting, and high-detail prototypes.
Watch out: It is susceptible to —if it touches sulfur (found in some clays), latex, or certain 3D prints, it may stay gooey and never harden. buy silicone for mold making
Hardness is measured on the . Lower numbers are softer and more flexible: Mold Making and Casting Products by Category - Smooth-On Best for: Food-safe applications (if certified)
Watch out: It has higher shrinkage (up to 1%) and a shorter "library life," often becoming brittle after 1–2 years. 2. Select the Right Hardness (Shore A) or certain 3D prints