Collection: Rubber Stoppers & Silicone Bungs

We carry a wide variety of sizes and styles to fit all of your fermentation needs. Whether you're looking for a single stopper for your carboy or bung for your fermenting bucket, we have you covered.

Our stoppers and bungs are made from high-quality, food-grade silicone, ensuring that they won't impart any unwanted flavors or odors to your brew. They are also highly durable and resistant to extreme temperatures, making them perfect for use in both hot and cold fermentations.

At Howdy Brewer, we know that every brewer has their own unique needs, which is why we offer a wide range of sizes and styles. From solid stoppers to universal bungs, we have everything you need to keep your fermentations airtight and secure.

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70 Products

  • #10 Rubber Stopper with Drilled Hole for Airlock on Glass & Plastic Carboys #10 Rubber Stopper with Drilled Hole for Airlock on Glass & Plastic Carboys
    Save 70%
  • PACK OF 2 - Twin Bubble Airlock and Carboy Bung Stopper fits 3, 5, 6, 6.5 Gallon Carboys PACK OF 2 - Twin Bubble Airlock and Carboy Bung Stopper fits 3, 5, 6, 6.5 Gallon Carboys
    Save 33%
  • #7 Rubber Stopper for 5 & 6 Gallon Glass Carboys with Drilled Hole for Airlock #7 Rubber Stopper for 5 & 6 Gallon Glass Carboys with Drilled Hole for Airlock
    Save 58%
  • #6 Rubber Stopper for 1 Gallon Jugs with Drilled Hole for Airlock #6 Rubber Stopper for 1 Gallon Jugs with Drilled Hole for Airlock
    Save 13%
  • Universal Rubber Stopper - Size #6-7 (Solid)
    Save 40%
  • 5 PACK Three-Piece Airlock and Drilled #6.5 Stopper Fermentation Beer Making Wine Making Kombucha Fits Gallon Jugs 5 PACK Three-Piece Airlock and Drilled #6.5 Stopper Fermentation Beer Making Wine Making Kombucha Fits Gallon Jugs
    Save 50%
  • #2 Rubber Stopper with Hole for Airlock - Fits Beer Bottles
  • 3 Piece Airlock with #10 Rubber Stopper for Homebrew Carboys - Fits Glass & Plastic 3 Piece Airlock with #10 Rubber Stopper for Homebrew Carboys - Fits Glass & Plastic
  • 5 PACK Three-Piece Airlock and Drilled #6 Stopper Fermentation Beer Making Wine Making Kombucha Fits Gallon Jugs 5 PACK Three-Piece Airlock and Drilled #6 Stopper Fermentation Beer Making Wine Making Kombucha Fits Gallon Jugs
    Save 39%
  • Carboy Bung (Silicone) - Solid Carboy Bung (Silicone) - Solid
    Save 51%
  • Universal Rubber Stopper - Size #10 (With Hole) (3630445723728) Universal Rubber Stopper - Size #10 (With Hole) (3630445723728)
    Save 17%
  • Rubber Stopper - #11 Solid Rubber Stopper - #11 Solid
    Save 60%
  • 6.5 Rubber Stopper with Hole for Airlock fits 1 Gallon Glass Carboy Jugs 6.5 Rubber Stopper with Hole for Airlock fits 1 Gallon Glass Carboy Jugs
    Save 52%
  • #8 Rubber Stopper with Hole - Fits 1000mL Flasks #8 Rubber Stopper with Hole - Fits 1000mL Flasks
  • Speidel Replacement Rubber Airlock Stopper for Speidel Plastic Fermenters Speidel Replacement Rubber Airlock Stopper for Speidel Plastic Fermenters
    Save 8%
  • Solid Rubber Stopper for 1 Gallon Carboy Fermenting Jugs Solid Rubber Stopper for 1 Gallon Carboy Fermenting Jugs
    Save 17%
  • Universal Rubber Stopper - Size #6-7 (With Hole)
    Save 34%
  • Carboy Blow Off Hood (Smooth Neck Carboy Cap) (3630445297744)
    Save 55%
  • #9.5 Rubber Stopper with Hole - Fits 2000mL Flasks #9.5 Rubber Stopper with Hole - Fits 2000mL Flasks
    Save 20%
  • Rubber Stopper - #000 Solid
    Save 82%
  • #6.5 Solid Rubber Stopper #6.5 Solid Rubber Stopper
    Save 86%
  • Rubber Stopper - #12 With Hole
    Save 26%
  • Two Hole #10 Brewmaster Silicone Stopper
    Save 16%
  • #3 Rubber Stopper with Hole for Airlock - Fits Beer Bottles
    Save 51%