This Castaldo® Gold Label® strip is a more pliable, natural rubber perfect for difficult patterns that might break in a stiffer mold. Castaldo natural mold rubber is made with a high concentration of pure natural rubber, making it pliable and durable. All Castaldo natural organic mold rubber products require a release agent.
Castaldo®—known throughout the jewelry industry for performance, dependability and value—manufactures mold rubber trusted the world over.
Sold in a 5-lb. pack.
Organic, natural mold rubber has a shelf life of one year if stored in a cool, dark place. You can extend the shelf life to two years by refrigerating the rubber. Organic mold rubber material should not be exposed to sun or heat; such exposure will shorten its shelf life and will cause it to prematurely cure.