Seal Your Fermentation with Confidence Using #7 Solid Rubber Stoppers The #7 Solid Rubber Stopper is a practical and reliable solution for creating an airtight seal on your fermentation or storage vessels. Designed without a hole, it’s perfect for times when you want to completely block airflow—ideal for aging, storing, or isolating your brews. This stopper fits snugly into the mouths of carboys, jugs, and fermenters that require a #7-sized seal. Whether you're working with beer, wine, mead, or cider, its solid design ensures your batch stays protected from contaminants and oxidation. Key Features Airtight Closure: Solid plug design fully seals the vessel opening. Food-Grade Rubber: Made from durable, flexible rubber that won’t crack or crumble. Sized to Fit: Designed to fit containers that require a #7 stopper—great for mid-sized vessels. No Tools Needed: Simply push in place for a secure and leak-resistant seal. Usage Tips Ideal for sealing vessels during storage, transport, or post-fermentation aging. Not intended for use with airlocks—use a drilled version if venting is needed. Specifications Stopper Size: #7 Top Diameter: ~1.25 inches (31.8 mm) Bottom Diameter: ~1 inch (25.4 mm) Material: Food-grade rubber Hole: None (solid) Why Choose This Stopper? For situations where no air exchange is needed, the #7 Solid Rubber Stopper is a must-have. It’s dependable, easy to use, and versatile across a wide range of fermenters and containers. At SoCal Brewing Supply, our stoppers are always fresh, reliable, and sourced with homebrewers in mind. #7 Solid Stopper Notes Use a #7 solid stopper where a compatible vessel needs a sealed closure without an airlock hole. Check the taper against the vessel opening before filling. Clean and dry rubber stoppers after use, and replace any stopper that becomes cracked or sticky. Related supplies: fermenters and accessories.
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