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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.

This product is currently out of stock and unavailable.

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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 33 reviews
james o. coles (Elba, AL, US)
Great for fermenting!

I thoroughly enjoy eating kimchi, kraut & fermented veggies but have had as many failures as successes in my attempts to create delicious, nutritious fermented foods -- until these little jewels came into my life.
I've made two perfect batches of kimchi -- one cabbage, the other cucumber...and I have mustard leaf with horseradish leaf (Gat) kimchi brewing now.
The combination of self-venting caps & the glass weights works well & I think will help me expand my fermented foods adventures.

Cornelia Bannowsky (Evansville, IN, US)
Weights and lids

Love your products and service. Only one regret: I should've ordered more lids, now they're out of stock. I hope you get them back.

B.D. (East Falmouth, MA, US)
Good stuff

I only purchased the fermentation lids and the glass weights. The turn around was quicker than expected which I appreciated. I guess the only knock (this may seem nitpicky) and it’s not a deal breaker, is the jar rings seemed flimsy. Had to work them a little get a good seal. Thanks for a great solution.

colleen wallace (Denver, CO, US)
As advertised

Just started using the airlock lid but it seems to work well. Gets a tight seal, super easy to use, and seems very durable.

Patty Fink (Hood River, OR, US)

I never received the package - where is it?

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