Resources
Glossary
Vulcanization
Vulcanization is a chemical process used to strengthen rubber by adding sulfur (or other curatives) and applying heat. This process forms cross-links between the long molecular chains of raw rubber, transforming it from a sticky, soft material into one that is more durable, elastic, and resistant to heat, wear, and aging.
For fasteners and industrial uses, vulcanization is important in the production of rubber washers, seals, gaskets, O-rings, and vibration-damping components. Without vulcanization, natural rubber would deform easily, lose strength, and degrade quickly. With it, rubber parts can maintain consistent performance under mechanical stress, temperature changes, and chemical exposure.