Generally considered the "gold standard" for its extreme dimensional accuracy and longevity . It has virtually zero shrinkage (around 0.04%) and can last for decades.
Known as the "workhorse" because it is more affordable and resistant to inhibition. buy silicone for mold making
Best for: Beginners, large industrial molds, and masters that might contain sulfur or other contaminants. Generally considered the "gold standard" for its extreme
Best for: Food-safe applications (if certified), resin casting, and high-detail prototypes. large industrial molds
Hardness is measured on the . Lower numbers are softer and more flexible: Mold Making and Casting Products by Category - Smooth-On