Zak Jewelry Tools

Castaldo® Gelato® Super High Strength Silicone Rubber

Mold cutting is easy with Castaldo® Gelato® Super High Strength Silicone Jewelry Molding Rubber. Cuts like butter. It resists tearing and is strong enough to make complex molds that are stronger than any other silicone molding rubber on the market. Molds last and last. Shiny finish! A shiny finish on your molds means a shiny finish on your waxes. That means less  polishing of your castings. There is no need for messy mold release spray. Castaldo Super High Strength Silicone Jewelry Molding Rubber gives waxes a smooth, shiny finish that won’t stick to the mold. Mold packing is easy! All you have to do is spread and press it in with your fingers. Just like putty. Special note about shrinkage rates: The figures given for this and all other rubber molding compounds are for the rubber mold itself, not the wax pattern it produces or the final casting produced from the wax pattern. The same rubber compound molded around the same metal master model can produce highly variable final casting shrinkage rates depending on the mold maker & caster’s skill, knowledge, precision and attention to detail. Final casting shrinkage is the result of the jewelry manufacturer’s procedures. Strips measure 18" x 2 7/8th" x 1/8th" (45.7 cm x 7.3 cm x 3 mm).  5 lb. strips. Instructions.
Shore A Hardness 38-40
Vulcanizes at: 165 ̊ - 176 ̊C / 330 ̊ - 350 ̊F
Rubber shrinkage Medium 2.3%
Elongation before break 667%
Tensile strength before break

1204 psi

8.3 n/mm²

Tear Strength before break

121 lb./in.

21.2 n/mm

Uses High strength. General purpose.
Color Multi
MSDS Here