Weck Mold Jar

Yes, each Weck Mold Jar comes as a complete set, including the glass lid, the rubber gasket, and two stainless steel clamps necessary to create an airtight seal.

While the glass is durable, you should always allow the jar to reach room temperature before moving it from a freezer to a microwave to prevent thermal shock and potential cracking.

Absolutely. Weck jars are specifically designed for home canning and preserving, provided you use the correct rubber gasket and clamps to ensure a proper vacuum seal during the process.

Once the canning process is complete and a vacuum seal has formed, the lid will stay secure without the clamps. However, for everyday storage or transport, it is recommended to keep the clamps on to ensure the lid remains firmly in place.

Yes, the glass jars are dishwasher safe. We recommend hand-washing the rubber gaskets to help them maintain their elasticity and longevity over time.

After the jars have cooled completely, you can test the seal by removing the metal clamps and gently lifting the lid by the edge. If the lid remains firmly attached to the jar, a proper vacuum seal has been achieved.