Home Brew Forums > Home Brewing Beer > Bottling/Kegging > Oxygen "Absorbing" Caps
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Old 11-25-2008, 01:47 PM   #21
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Originally Posted by Austinhomebrew View Post
You are doing yourself and your beer a disservice. No brewery sanitizes their caps.
But quite a few* pasteurize the beer after it has been bottled, making that previous step moot.


*There are those that don't, of course, but most that don't bottle condition do.


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Old 11-25-2008, 02:53 PM   #22
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Any of you guys who participate in swaps... do you bother with O2 absorbing caps? Or just regular caps for the trek across country?

I want to send some holiday cheer to California and it's a long haul from Tampa.
O2 in beer tends to be a longer term problem. Short hauls during a swap, or beer stored for a few weeks shouldn't be a problem.

Now that said...you're never sure how much jostling a bottle will go through during shipment. Eliminating as much O2 as you can prior to shipping is probably beneficial. For me I prefer to cap with O2 absorbing caps, let the bottles sit for 48 hours or so, and then ship. This (in my mind) has given the bottles enough time to let the O2 be "absorbed" and reduced oxygenation.


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Old 11-25-2008, 03:19 PM   #23
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It won't be a problem if you sanitize your caps. My point was don't waste extra money on O2 caps if you are going to sanitize them. Just use regular caps instead. If you sanitize the O2 caps you lose the benefit and the extra money spent on the caps.
If you had some of the O2 caps left open for a long time and were concerned about infection would a Pasteurization type process work? Say, put them in the oven at 150 degrees for 10 minutes or more. How would that effect the O2 absorbing properties of the cap?
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Old 11-25-2008, 08:17 PM   #24
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O2 in beer tends to be a longer term problem. Short hauls during a swap, or beer stored for a few weeks shouldn't be a problem.

Now that said...you're never sure how much jostling a bottle will go through during shipment. Eliminating as much O2 as you can prior to shipping is probably beneficial. For me I prefer to cap with O2 absorbing caps, let the bottles sit for 48 hours or so, and then ship. This (in my mind) has given the bottles enough time to let the O2 be "absorbed" and reduced oxygenation.
thanks for the advice!
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Old 03-08-2009, 05:45 PM   #25
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I know it's been a while since we discussed this, but James on Basic Brewing contacted the manufacturer to ask this very question to him. He said that sanitizing is absolutely no problem, because while the caps do absorb oxygen and are activated as soon as they get moist, it takes the caps several days to do their job, so a few minutes before getting crimped is OK. Seems like since this is the case, sanitizing them and letting them sit before shipping (or moving around at all really) would be the best way to go about using the caps. So BierMuncher, you're doing it the right way.
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Old 08-01-2010, 08:06 PM   #26
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So I followed the directions of the Austin Home Brew person as I get my stuff from them. I bottled a barley wine yesterday around 11% alcohol and used the 02 caps with no sanitizer. I very nervous about contamination and wanted to get your thoughts about me taking the caps off and putting new sanitized ones on?
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Old 08-01-2010, 08:19 PM   #27
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RDWHAHB It should be no problem. You have to keep your caps clean. Micro breweries around here do not sanitize the caps. I have never sanitized my caps in the last 20 years and have not had a problem. It certainly won't hurt. Wash your hands before you touch them.

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Old 08-01-2010, 08:24 PM   #28
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Originally Posted by BarleyWater View Post
I know it's been a while since we discussed this, but James on Basic Brewing contacted the manufacturer to ask this very question to him. He said that sanitizing is absolutely no problem, because while the caps do absorb oxygen and are activated as soon as they get moist, it takes the caps several days to do their job, so a few minutes before getting crimped is OK. Seems like since this is the case, sanitizing them and letting them sit before shipping (or moving around at all really) would be the best way to go about using the caps. So BierMuncher, you're doing it the right way.
im glad to hear of someone doing their homework on this one,i use those caps and always sanitized thinking this was the right thing to do, but to hear it from the manufacturer tells me its o.k.(not just because so and so said it)
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Old 02-28-2011, 03:27 AM   #29
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Really good discussion in this thread. I was searching for this because I was listening to the recent Brewing Network Sunday Session about bottling and some of those dudes were advocating using oxy caps without sanitizing. They made the point that it is crucial to clean and sanitize bottles, but the caps come very clean and shouldn't present any contamination issues if handled properly.
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Old 02-28-2011, 09:59 AM   #30
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So for the folks that HAVE to sanitize their caps...... Just have dip your caps in sanitizer right before placing them on the bottle. This way they are sanitized and activated. Problems?


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