Known as the "workhorse" because it is more affordable and resistant to inhibition.
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) buy silicone for mold making
Best for: Beginners, large industrial molds, and masters that might contain sulfur or other contaminants. Known as the "workhorse" because it is more
Hardness is measured on the . Lower numbers are softer and more flexible: Mold Making and Casting Products by Category - Smooth-On Select the Right Hardness (Shore A) Best for:
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.
When buying silicone for mold making, the choice depends on your project's detail, the material you're casting (like resin or food), and how long you need the mold to last. 1. Choose Your Cure Type There are two main chemical families for silicone rubbers:
Best for: Food-safe applications (if certified), resin casting, and high-detail prototypes.