Castaldo White Label Jewelry Molding Rubber is a firm, high-quality vulcanizing rubber with a high concentration of pure natural gum rubber. Firmer than Castaldo Gold Label, White Label delivers the resilience and pliability that experienced mold-makers rely on to produce consistent, high-quality molds efficiently. Available in two convenient forms — Strips or Ready-Cut (Pre-Cut) — both sold in 5 lb. boxes.
Features
- High concentration of pure natural gum rubber for superior resilience and pliability
- Firmer formulation than Castaldo Gold Label — ideal for experienced mold-makers
- Available as long Strips or Ready-Cut pieces to fit popular industry mold frames
- Ready-Cut pieces feature rounded edges for easy layering and placement
- Rubber thickness is 1/8″ throughout both formats
- Sold in 5 lb. boxes
Specifications
| Rubber Thickness | 1/8″ |
|---|---|
| Vulcanizing Temperature | 310°F |
| Vulcanizing Time | 15 minutes per 1/4″ of mold frame thickness |
| Sold By | 5 lb. box |
Available Options
| Part # | Format | Dimensions |
|---|---|---|
| 122.583 | Strips | 2-7/8″ wide × 18″ long × 1/8″ thick |
| 122.585 | Ready-Cut (Pre-Cut) | 1-7/8″ × 2-7/8″ × 1/8″ thick, rounded edges |






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