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The Best Mason Jar Seals to Keep Your Jarred Goods Fresh
Written By Review Team at the Kitchen Institute
For kitchen connoisseurs and canning enthusiasts, the covetted Mason jar is an irreplacable tool. But, without a proper seal, they can quickly go from functional to merely decorative. From safeguarding a food’s shelf life to maintaining the integrity of flavors, a good seal is incredibly important. Unfortunately, not all seals are created equal.
We researched the market, meticulously evaluating the best Mason jar seals based on durability, versatility, and efficiency. We’ve identified that County Line Kitchen Reusable Silicone Seals are the best overall due to their superior seal, longevity, and ease of use. Aside from County Line Kitchen’s seals, we’ve included a menu of other options that cater to various needs and budgets.
The Best Mason Jar Seals of 2025
County Line Kitchen Mason Jar Seals
Best Overall
County Line Kitchen’s Reusable Mason Jar Seals are your best bet for ensuring an airtight, leak-proof seal. With their simple and practical design, these seals will securely fit on the rim of any wide-mouth Mason jar. Other seals may end up falling out as they try to cling to the inside of the lid, but these stand firm on the jar’s rim.
These seals are made from FDA-grade, BPA-free, and dishwasher-safe silicone, making them reusable and eco-friendly. This pack of 12 seals offers a versatile solution, as they can team up with any wide mouth, screw top, or Mason jar lid. Their thickness of 3/32 makes them durable and long-lasting. However, this durability doesn’t extend to canning – these seals serve storage purposes only. These Mason jar seals are the best product overall on our list because of their durable build, eco-friendly material, and easy maintenance.
Mason Jar Lifestyle Mason Jar Seals
Most Secure Seal
Made for preserving food without a hitch, the Mason Jar Lifestyle Seals guarantee a fail-proof seal for Mason jar lids. Its leak-proof quality outshines others in preserving food freshness, making it a must-have for any home kitchen.
Reusable and built to last, these seals offer an eco-friendly solution for food storage, shifting away from disposable seals that contribute to waste. They secure a tight seal on your Mason jars, effectively locking in the flavor and freshness of your food items. The platinum silicone material ensures durability and reliability, promising long-term use without degrading.
Viceroy Mason Jar Seals
Best for Dry Goods Storage
The Viceroy Mason Jar Seals fit perfectly on regular mouth Ball and other wire-clamp jars, providing a secure and reliable seal every time. What’s more, these rubber rings, made from pure natural rubber, come equipped with a tab that effortlessly breaks the vacuum seal, simplifying the jar opening process.
With an inner and outer diameter of 2.5″ and 2.75″ respectively, these seals firmly secure your jar’s contents, ensuring a leak-proof and airtight seal. With 12 seals packed in a box, you can safely seal and store a variety of items, such as dry pasta, lentils, and baking ingredients.
SHEYNIAN Mason Jar Seals
Best Value
The SHEYNIAN 12-Pack Mason Jar Seals are high-quality silicone seals that provide an effective barrier, excelling in preventing leaks and preserving the freshness of your stored goods. Unlike regular Mason jar seals, these silicone gaskets are capable of withstanding regular use without losing their shape or effectiveness.
Each seal perfectly fits a 2.75 inch / 70mm regular mouth canning jar, ensuring a snug fit and optimal sealing performance. Additionally, the pack comes with twelve seals, ensuring you always have a spare at hand. Plus, they are BPA-free and dishwasher-safe.
ASTER Mason Jar Seals
Most Durable
The ASTER Replacement Silicone Mason Jar Seals ensure an immaculate seal on your Mason jars, keeping your preserves fresh and flavorful. With a 3.75-inch diameter, these gaskets fit perfectly on Mason jar mouths, eliminating the risk of spills or leaks.
Made from durable silicone, these gaskets are incredibly durable, saving you the hassle of frequent replacements. They effortlessly slide onto the rims of your jars, making the canning process a breeze. They clean up easily with warm water and a bit of detergent, then bounce back to their original shape for reuse, time and time again.
5 Factors to Consider When Buying Mason Jar Seals
Whether you’re an avid home canner, a DIY enthusiast, or someone who simply appreciates the aesthetic and practical benefits of Mason jars, the quality of your Mason jar seals is crucial. A good seal ensures the freshness and longevity of your stored goods, prevents leaks, and protects against contamination. This buying guide will dive into everything you need to know when buying a Mason jar seal so you can find the perfect ones for your canning journey.
Material
Mason jar seals come in different materials, including metal, plastic, and silicone. Each material has its benefits and drawbacks. Metal seals, for instance, provide a solid and reliable seal, but they can rust over time and are not reusable. Plastic seals, on the other hand, are reusable and durable, but some might not provide as tight a seal as their metal counterparts. Silicone seals are flexible, reusable, and provide a good seal, but they may wear out faster. Choosing the right material depends on your specific needs and how frequently you plan to use the seals.
Size
Size matters when you’re shopping for Mason jar seals. Seals that are either too large or too small will not properly secure your jar. Seals come in sizes that correspond to the standard jar sizes, typically regular and wide-mouth. Ensure you match the seal size with the jar opening size for an optimal fit.
Thickness
The thickness of the Mason jar seal plays a critical role in its effectiveness. Thicker seals tend to create a more robust and secure seal, which is essential for preserving foods. However, they might be more challenging to fit into the jar. Thinner seals may be easier to use but might not provide as secure a seal. Therefore, consider the type of content you will store in the jar when deciding on the seal’s thickness.
Brand Quality
Not all Mason jar seals deliver the same performance, even if they have similar specifications. Some brands are more reliable and trusted than others. It’s essential to consider the reputation of the brand and read reviews from other customers. Brands that have consistently positive reviews are likely to offer high-quality seals that will serve you well.
Price
While it’s not always the case, the price can often be an indicator of a seal’s quality. Cheaper seals may not provide the same level of longevity or reliability as their more expensive counterparts. On the other hand, opting for the priciest seal isn’t necessarily the best route either. It’s crucial to find a balance and choose a seal that offers good value for money – that is, it performs well and falls within your budget.
Mason Jar Seal FAQs
Can I reuse Mason jar seals?
In general, metal Mason jar seals should not be reused for canning. While the seal may initially appear to be in good shape after use, the sealing compound can degrade over time, which may not provide a reliable airtight seal in subsequent uses.
How do I clean the seal?
You can clean Mason jar seals with warm, soapy water. You should dry them thoroughly after cleaning to prevent rust.
Can Mason jar seals go in the dishwasher?
While the metal lids can technically withstand the dishwasher, the heat and moisture can cause them to rust over time.
Why isn’t my Mason jar sealing?
If your Mason jar isn't sealing, it could be due to a variety of factors. The seal could be old or damaged, the rim of the jar could have chips or cracks, or the band may not have been screwed on tightly enough.
Can Mason jar seals be used for freezing?
Yes, you can use Mason jar seals for freezing. However, you should leave extra space in the container to allow for the expansion of the contents as they freeze.
Are Mason jar seals microwave-safe?
No, Mason jar seals are not microwave-safe. The metal in the seals can spark or catch fire in a microwave. Always remove the seal before microwaving the contents of the jar.
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