Castaldo® Gold Label® is a more pliable, natural mold rubber that has a high concentration of pure natural gum rubber, which makes it resilient and pliable; characteristics that will enhance your mold-making process.  Castaldo® Gold Label® is ideal for difficult patterns that might break in a stiffer/hard mold. Castaldo® natural organic mold rubbers require a release agent (see related products).  Castaldo Jewelry Natural Molding Rubber has been the industry standard for more than 40 years and continues to be the best jewelry molding rubber available for lost wax jewelry casting.  Supplied in a convenient ready-cut squares which makes it ready to use.  Also available in a 5 lb box of Pre-Cut strips, 5 lb convenient roll as well as a larger 50 lb bulk roll.  Made in Thailand

Specifications:

Dimensions :   Pre-Cut Squares, Approx 130 pcs (+/- 2 Pcs)

Roll Weight:   5 lbs / 2.27kg

Vulcanization Temperature: 307°F (153°C)

Rubber Shrinkage: 2.1%

Vulcanization Time: 15-30 Minutes (Depending on Mold Thickness)