Silicone Flask Gasket

These high-temperature silicone gaskets are designed to create an airtight seal for casting flasks with 4 ½ and 5 ½ inch diameters. They are engineered to withstand the intense thermal pressure of 900 degree casting cycles without losing their elasticity.

The durable material ensures a consistent vacuum seal that is critical for achieving high-density metal fills in jewelry. These gaskets are a long-lasting solution for workshops that perform frequent vacuum casting operations.

Proper maintenance of these seals prevents air leaks that can lead to significant casting porosity defects.