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Old 12-19-2011, 04:48 AM   #1
Aug 2011
Hartford, WI
Posts: 37


When should you use Oxygen-Absorbing Crown Caps?

What is difference between oxygen scavenging and oxygen barrier caps and which to you use for what?

How do know which one is which if you were trying to buy them?

I saw a bin with Oxygen-Absorbing Crown Caps in Brew Supply store, and when i tried to research the product, the more info and posts I found, the more confused I became.


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Old 12-19-2011, 05:31 AM   #2
Apr 2009
Boise, ID
Posts: 1,608
Liked 38 Times on 33 Posts

O2 absorber caps have a grey lining on the inside of the cap. I don't know how beneficial they are, really, but at $0.50 more for a bag of them compared to regular caps I figure it can't hurt to use them.
"I can't believe how many people think Air Lock is pronounced Hydrometer." -BigKahuna
"If you gave me a beer with placenta in it without telling me I would kick you in the nuts." -ODaniel
"We be in a big hurry for dope beer with much alcamahol and flavor, quality, balance, and aroma don't matter. We just wantz to be druck, u know?" -Yooper

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Old 12-19-2011, 07:22 PM   #3
Apr 2011
., Connecticut
Posts: 1,497
Liked 43 Times on 42 Posts

What is difference between oxygen scavenging and oxygen barrier caps and which to you use for what?
"scavanging" would mean that they actively remove oxygen that would be in the bottle. "barrier" would just mean they prevent oxygen from getting in.

oxygen scavanging caps are more beneficial for long term storage of beer. if you are drinking it in a few weeks to a few months, you might not notice a difference. if you plan on aging your beer for several months, you will probably taste a difference depending on how much oxygen you normally end up with in your bottles (changes depending on your process).

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