Hey there! If you’re on the hunt for rubber seals for glass jars, where you can buy them really depends on what you need them for. Are you looking to seal glass jars for home use? Or do you need to buy them in bulk for industrial purposes? Maybe you’re a trader in need of a manufacturer for rubber seal accessories?

Well, let me introduce you to ANT PACK. We’re a glass jar manufacturer based in China with 16 years of experience under our belt. We’ve got the know-how when it comes to glass jars, and we also know a thing or two about the accessories that go with them. In this article, we’ll give you some recommendations based on different uses!

If you’re in the market for rubber seals for glass jars for home use, here are some options for you:

1. Online Shopping Platforms

You can check out Amazon or eBay. Just search for “rubber seals for glass jars” and you’ll find a wide variety of sizes and types to choose from .

2. Home Goods Stores

Stores like IKEA, Walmart, Home Depot, or Lowe’s usually have a good selection of home goods, including glass jars and their matching rubber seals .

3. Kitchenware Stores

Many stores that specialize in kitchenware also sell glass jars and rubber seals. It’s worth checking out your local kitchenware store.

4. Local Grocery Stores or Supermarkets

Some larger supermarkets or grocery stores may also carry rubber seals for glass jars.

5. Original Brand Channels

If you need to purchase seals for branded jars, you can buy the original brand’s rubber seals. For example:

WECK Brand Seals

WECK is a (century-old) German brand. Their sealing jars have a split design, and the rubber rings are original accessories. You can purchase them through the WECK official website or authorized dealers.

KILNER Brand Seals

The rubber rings for KILNER sealing jars from the UK can also be selected through the brand’s official website or platforms like Amazon. Their split sealing lid design requires a dedicated rubber ring.

Mason Jar Original Accessories

For genuine Mason jars (such as Ball or Kerr brands), you can buy the rubber rings on Amazon, the brand’s official website, or home goods stores like IKEA. Be sure to distinguish between cheap imitations and genuine products.

For Bulk Purchases

Whether you’re a brand or manufacturer of glass jar products, or a trading intermediary, when you need to purchase rubber seals in bulk, B2B websites like Alibaba, Made in China, or Global Sources are recommended. Just search for “rubber seals for glass jars,” and you’ll find different suppliers who can provide you with quotes.

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Note：

1. When you’re buying for personal use, make sure to measure the opening of your glass jar so you can get the right size rubber seal. If you’re buying online, check the seller’s size information and return policy.

2. It’s best to choose food-grade silicone or natural rubber materials and avoid products that contain harmful substances like BPA.

3. Original accessories usually cost a bit more, while generic ones are cheaper. For custom bulk purchases, you’ll need to discuss the price with the manufacturer.

ANT PACK has been focusing on producing glass jars for 16 years and provides matching accessories. We’ve been working with the largest glass jar importer in Canada for many years, so the quality is guaranteed! If you need to buy rubber seals in bulk, feel free to contact us at [email protected].

Also, we have various types of metal lug caps with rubber seals that perfectly match food glass jars! For more details, click here: Metal Lug Caps and contact us!

What are jars with rubber seals called?

 

Jars with rubber seals are often called airtight jars, canning jars, preserving jars, or storage jars with rubber gaskets. Here are some common types:

Mason jars : These are widely used for canning and preserving fruits, vegetables, and other food items. The rubber seal helps create an airtight environment to keep the food fresh for a longer time.

Canning jars: Similar to mason jars, canning jars are specifically designed for the canning process. They come in different sizes and shapes and the rubber seals ensure a proper seal during the canning process.

Preserving jars : These jars are used for preserving jams, jellies, pickles, and other food products. The rubber seals help maintain the quality and flavor of the preserved food.

Storage jars : They are used for storing a variety of items such as dry food, spices, coffee, tea, and more. The rubber seals prevent air and moisture from entering the jar, keeping the contents fresh and protected.

How do you measure a jar seal?

1. Measuring the Seal Itself

​Inner Diameter (ID)

​Tools: Vernier caliper (most accurate) or flexible measuring tape/string.

​Method:

Lay the seal flat in a circular shape. Measure the distance between the ​inner edges​ of the seal (i.e., the diameter of the inner circle).

If using a string: Wrap it around the inner edge, measure the length, and divide by π (~3.14) to approximate the ID.

​Cross-Sectional Diameter (CS)

​Tools: Vernier caliper or ruler.

​Method:

Measure the thickness of the seal’s cross-section (diameter for round seals or side length for square/rectangular seals).

For flat seals, measure both width and thickness.

​2. Measuring the Jar’s Opening

​Jar Opening Diameter

​Tools: Caliper or measuring tape.

​Method:

Measure the diameter of the ​groove​ below the jar’s threads (where the seal sits). Focus on the inner edge of the groove.

​Groove Depth

​Tools: Ruler or depth gauge.

​Method:

Place a ruler vertically into the groove and measure the depth from the groove’s base to the jar’s rim. Ensure the seal’s thickness does not exceed this depth.

How do you know if a jar seal is broken?

Visual Inspection

• Check the Lid : A bulging lid can indicate gas formation resulting from bacteria or yeast growth, which leads to spoilage. If the lid is concave (curving inward), it’s usually a good sign of a proper seal. You can hold the jar at eye level and look across the lid. If the center of the lid is either flat or bulging, it may not be sealed.
• Look for Leaks or Rust : Any signs of leaks or rust on the lid can also indicate that the seal is broken.

Finger Test

• Press the Center of the Lid : Gently press down in the center of the lid. If it pops back up, the seal is likely broken. If it stays down, the jar is sealed properly. A vacuum sealed jar will not have a lid that can move or spring up.

Tapping Method

• Tap the Lid with a Spoon : Tap the jar lid with the bottom of a teaspoon. If it makes a dull sound, the lid is not sealed. If food is in contact with the underside of the lid, it will also cause a dull sound. The sound will be high – pitched if the jar is sealed correctly.

Float Test

• Fill a Bowl with Water : Fill a bowl with water and place your jar upside down in the water. If it’s sealed, it will float. If it’s not, it will sink.

Smell and Taste Test

• Smell Test : If you notice an off odor or a sour smell when you open the jar, it’s best to discard the contents.
• Taste Test : In situations where the food looks and smells okay but you still have doubts, the best test is a small tasting. If the flavor is off, it’s safer to throw it out.

Media Contact
Company Name: Xuzhou Ant Glass Products Co., Ltd.
Email: Send Email
Country: China
Website: https://www.antpackaging.com/