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Silicone Fermentation Airlock Valve Lid With SS Band for Wide Mouth Mason Jars


Our fermentation lid for Wide Mouth (3″ internal diameter) Mason jars will revolutionize your fermenting!

Super Easy – The “bubble” on the top has a slit cut in it. When pressure builds up in the jar, the lid bulges up. This automatically opens the slit and lets the CO2 produced by fermentation escape. No more burping and no more topping up the water in the airlock!

Be sure to pinch open the slit on the bubble before the first use. If you don’t see it, push the bubble inside out and pinch.

High Quality – Silicone rubber is dishwasher, freezer, and microwave safe. Silicone is a safe, non-plastic (BPA free) material for food use that does not leach any chemicals.

Rust Proof Band Included – Made of 304 grade 18/8 stainless steel, the band is also dishwasher safe!

One silicone valve lid and one stainless steel wide mouth band per order.

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Bulk discounts - buy more and save! (Cannot be combined with coupons)

5 - 19 $2.39$4.39
20 - 39 $2.09$3.84
40 - 99 $1.79$3.29
100+ $1.50$2.75

These lids greatly reduce your chances of getting mold or kahm yeast in your ferment.

The truth about silicone valve lids:

All brands of silicone valve lids are not truly 100% one-way valves. At a certain point in the fermentation process, negative pressure is often created inside the jar. You may see your valve lid caving in, and a very small amount of air will likely leak into the jar. You may even need to pinch the valve to let air into the jar, so the lid can return to a normal position. This is undesirable, but in my testing I have found that it has a minimal effect. My ferments don’t seem to get moldy at any higher rate than with other airlock lids, and other people have good results using other brands of silicone valve lids. These lids are much more convenient because you do not need to monitor the water level in an airlock, they have fewer pieces to clean and assemble, they have a lower profile, and they are unbreakable. Personally, I think these benefits are worth the small extra risk of contamination.

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Customer Reviews

Based on 28 reviews
Mike Makuta (Mount Olive, IL, US)
Best way for honey fermented garlic

First timer for garlic fermented in honey.
Almost TOO easy with these silicone air locks.
This is the only way to go.
Thanks, Mike

Jaime Beechum (Seattle, WA, US)

Working as it says! So very simple. Thank you!

Jodi Dominick (Carbondale, PA, US)
A great idea

I have not had a chance to use these yet but Hubby is starting to ferment some of our garden bounty and he thinks it's a great idea!

Linda Harvey (Alachua, FL, US)

Haven’t used yet. Just made a huge batch of kraut using my vacuum release lids so it will be a while. Love the idea of these.

Rachel Stewart (Seattle, WA, US)
Great Lids and Weights

I’ve never used lids with release slits before. What a game changer. The weights and lids together make the perfect fermentation vessel. I recommend both.

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