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TPE Rubber Stopper for Fermentation – Solid Bungs

TPE Rubber Stopper for Fermentation – Solid Bungs

Price range: $0.95 through $4.99

  • Air-Tight Seal and Oxygen Barrier: Creates an air-tight seal on fermentation containers to prevent oxygen from entering, helping to maintain the quality and flavor of the fermented product.
  • Premium Materials: Made from TPE (thermoplastic elastomer), a durable rubber-like, recyclable material.
  • Variety of Sizes For All Needs: Available in a range of sizes (#2, #3, #5.5, #6, #6.5, #7, #7.5, #10, #10.5, #11) to fit different fermentation container sizes.
  • Reusable and Easy to Use: These stoppers are reusable and cost-effectiveness and are simple to insert and remove with a tapered design that provides a secure fit.
  • Quality Assurance: Made of high-quality materials and designed to meet the needs of home fermentation enthusiasts, ensuring a reliable and effective fermentation process
Delivery by Oct 23rd, 2025 - Oct 29th, 2025
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Solid Rubber Stopper
Solid Rubber Wine Stopper

TPE Solid Rubber Bung Stoppers for Fermentation

Rubber bungs are used when fermenting to completely seal or create an airtight barrier between the airlock and opening of your fermenter. These bung stoppers are made from TPE (thermoplastic elastomer), a durable rubber-like, recyclable material.

Depending on your needs you have two options: Solid Rubber stoppers create a complete seal while drilled rubber stoppers have a hole drill into them which fits a standard size airlock or a small blow-off tube.

Solid rubber stoppers come in assorted sizes and are required to create an airtight seal in most fermentation. The rubber bungs are tapered for a better seal and holds the airlock securely in place. The curved lip also stops the bung from accidentally sliding into your fermenter. These TPE stoppers have many uses in fermentation which include beer brewing, cider, and winemaking, just to name a few.

Bottle Rubber Stopper

An Essential Resource For Homebrewers

Solid Rubber Stopper

Solid rubber stopper is one of the most basic tools for homebrewers of all experience levels to have on hand. The rubber stoper fits perfectly into your fermentation vessels to create an airtight seal for your fermentations and homebrews.

How does the solid rubber stopper work?

Plug the stopper into the mouth of your carboy or fermenter. This will create an airtight seal that prevents oxygen contact during fermentation.

Solid Rubber Bungs Stopper

Finish Your Ferments

Create An Airtight Seal

The food-grade TPE rubber and design of the solid rubber stoppers keep the stopper in place and create an airtight seal on top of your brewing vessels.

What size rubber stopper do I need for my fermenter?

Stoppers come in various sizes and are sized by number but what do these numbers mean? To determine the correct stopper size, measure the diameter of the mouth of your carboy or fermenter, and compare it to the rubber stopper size chart below. This chart will help you quickly determine which stopper you need by most popular brewing equipment and provides a diameter for each stopper style in inches.

Fermentation Rubber Stopper

Make All Your Fermented Favorites

Endless Small Batch Fermentations

Make your favorite ales and lagers, experiment with winemaking, make your famous batches of kimchi and sauerkraut, and much, much more all with this simple tool.

Rubber Stopper Size Chart
Rubber Bung Stopper Size Chart

Stopper Type Compatible With:

  • No. 2 Stopper – Fits standard beer and wine bottles.
  • No. 5 Stopper – Fits Big Mouth Bubbler® EVO 2 w/screw-on lid (older EVO 2 models) & Little BMB.
  • No. 6 Stopper (Drilled or Solid) – Fits standard 1 Gallon Jugs.
  • No. 6.5 Stopper (Drilled or Solid) – Fits Glass carboys, Big Mouth Bubbler® plastic (5 or 6.5 gallons), or EVO 2 w/ Universal Lid. The ideal fit is the 6-gallon carboy.
  • No. 7 Solid Stopper – Fits 5 Gallon glass carboys
  • No. 10 Solid Stopper – Fits Bubbler® 5 or 6 gallon
  • Small Universal Stopper (Drilled or Solid) – Fits  Glass Carboys (3, 5, 6, 6.5), Big Mouth Bubbler® Plastic 5 or 6.5-gallon or EVO 2 w/ Universal Lid.
  • Medium Universal Stopper (Drilled or Solid) – Fits Bubbler® 5 or 6-gallon.
Food Grade Rubber Stopper
Solid Bungs And Stoppers For Fermentation
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    Product Details

    • Air-Tight Seal and Oxygen Barrier: Creates an air-tight seal on fermentation containers to prevent oxygen from entering, helping to maintain the quality and flavor of the fermented product.
    • Premium Materials: Made from TPE (thermoplastic elastomer), a durable rubber-like, recyclable material.
    • Variety of Sizes For All Needs: Available in a range of sizes (#2, #3, #5.5, #6, #6.5, #7, #7.5, #10, #10.5, #11) to fit different fermentation container sizes.
    • Reusable and Easy to Use: These stoppers are reusable and cost-effectiveness and are simple to insert and remove with a tapered design that provides a secure fit.
    • Quality Assurance: Made of high-quality materials and designed to meet the needs of home fermentation enthusiasts, ensuring a reliable and effective fermentation process

    Additional information

    Weight0.2 lbs
    Dimensions1 × 1 × 1 in
    Solid Rubber Stopper

    #2 Solid Rubber Stopper, #3 Solid Rubber Stopper, #5 Solid Rubber Stopper, #5.5 Solid Rubber Stopper, #6 Solid Rubber Stopper, #6.5 Solid Rubber Stopper, #7 Solid Rubber Stopper, #7.5 Solid Rubber Stopper, #8 Solid Rubber Stopper, #8.5 Solid Rubber Stopper, #9.5 Solid Rubber Stopper, #10 Solid Rubber Stopper, #10.5 Solid Rubber Stopper, #11 Solid Rubber Stopper, #13 Solid Rubber Stopper