Fine Quality Materials Made of quality foodgrade silicone, this jar sealer for mason jars is durable for longterm use and resistant to temperatures. AirTight Seal The rubber seals for glass jars fit tightly without leakage and provide a strong air seal. They are dishwashersafe and microwavesafe for convenient cleaning and reheating. Multifunctional Use Canning supplies ideal for sealing fruit and vegetable storage, homemade foods, toiletries, paints and craft supplies. Keeps contents clean and safe inside the canning jar and is useful for many daily tasks. Workmanship Rubber gasket keeps fruits and other foods fresh for a long time, resists deformation, and features a smooth, burr finish. Use scenarios Sealing homemade jams, sauces, or pickles in mason jars to preserve freshness and reduce spills. Storing dried herbs, spices, or small pantry items in jars for organized kitchen storage. Packaging travelsize toiletries or small craft supplies in jars for tidy, mess transport.