Foam Control (FermCap S)

Foam Control (FermCap S)

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No more boil overs, no more blow-off tubes. Once you’ve used Foam Control you’ll never brew without it again!

Foam control does just what its name suggests--it reduces foam production during  the hot-break portion of the boil, and it reduces the amount of krausen developed during fermentation.
Also known as FermCap S, Foam Control does not affect the head on your finished beer. In fact, it can actually increase the head by retaining head-forming compounds that would have been blown off during fermentation. It will settle-out of your beer before bottling or kegging as it is actually absorbed onto the surface of the yeast cells and filter media. 
Add two drops per gallon at start of fermentation. Comes in an eye dropper bottle for easy use. 1 oz is good for about 50 x 5-gallon batches of beer. Also available in bulk 1 gallon size.
Note: Keeps best when stored in the refrigerator.
Like Foam Control (FermCap S)? Then you will love CellarScience® Foam Axe - Anti Foaming Agent!
Community Q&A

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control boil overs
Marshall C on Sep 29, 2022
Just to get up to free shipping minimum. Always need more...
Valued C on Jun 29, 2022
control boil overs
Marshall C on Sep 29, 2022
Control the foam while fermenting in the 6 gal Torpedo Keg
Joseph on Jul 19, 2022
Just to get up to free shipping minimum. Always need more...
Valued C on Jun 29, 2022
Decided I might need it for newly ordered Air Still.
fieldho on Apr 22, 2022
for yeast starter
jim f on Apr 4, 2022
Essential to prevent boil overs
Daniel M on Feb 15, 2022
To control the foaming during boil
Kyle W on Feb 2, 2022
Great for fermenting in a corny keg.
Tysen Bibb on Feb 1, 2022
stopping boil overs
Joshua B on Jan 28, 2022
To avoid boilovers when makin yeast starter wort or durong a full batch as well. Works like a charm.
Fernando S on Jan 22, 2022
I'll be using this product for yeast starters
Eric E on Nov 6, 2021
kevin m on Aug 23, 2021
To ferment in keg
Jurrien K on Apr 21, 2021
prevent yeast starter boil over
Antonio Martinez on Mar 16, 2021
It has saved me from many boil overs in the past and I have brewed to many batches without it.
Tristan B on Feb 2, 2021
If you enjoy boilovers then you don't need this
John c on Jan 15, 2021
to reduce krausen in fermenter
Valued C on Jan 8, 2021
yeast starters, brew kettle, carboy
Curtis S on Dec 8, 2020
Less boil overs
Dyami Q on Dec 3, 2020
Running low.
Jose L C on Dec 2, 2020
Looking to control fermentation over-flow / blowoff
John S on Nov 13, 2020
Does a great job mitigating boilovers in small brew kettles.
Nathan R on Sep 15, 2020
To control krausen
Ryland Matthews on Sep 7, 2020
watched video and researched
Gary Sanger on Aug 27, 2020
First two batches blew out my airlocks.
Jeff Harrington on Aug 5, 2020
To avoid blowouts when brewing.
Noah A on Jul 22, 2020
No blowoff!
David Roberts on Jul 15, 2020
it works
Steven D on Jul 9, 2020
Trying to control foam in yeast starters
William H B on Jun 16, 2020
Wouldn't brew without it. Prevents messy boil-overs
Kevin Dyson on Jun 16, 2020
Makes life sooooo much easier
Bradley Korte on Jun 8, 2020
to control foam on boil
try pressure fermenting in a keg
SHANE on May 29, 2020
Never tried it before, but saw it in a video and thought I'd give it a try
Scott S on May 14, 2020
Ever had a boil over? Me too. No longer with this stuff.
Eric O on May 9, 2020
Have used this for years and it's a gr8 product mentioned it to many people and they are surprised to hear about it.
Steve Van P on May 5, 2020
I don't like blowing things up with foam
Geoffrey N on Apr 29, 2020
Need it for boil overs
Ethan W on Apr 28, 2020
Best foam control I’ve had, I currently have the 5 star foam control and prefer fermcap
Chris Mylroie on Apr 18, 2020
Minimize head space while fermenting in keg
Eric N J on Apr 15, 2020
To control hot break on my BIAB system.
Chris P on Apr 14, 2020
avoid kitchen disasters
Patrick Bobosky on Apr 13, 2020
It works really well
Peter D on Apr 7, 2020
Used it before and helped me brew larger batches without boilover
J S on Mar 29, 2020
Keeps the kettle from boiling over when filling close to the top
John D on Mar 19, 2020
Low headspace
William d m on Mar 18, 2020
Excellent for controling boil over, quick to ship
Frank A on Mar 13, 2020
Reduce krausen during keg fermentation
Stephen O on Feb 20, 2020
To stop the madness
Andrew B W on Feb 8, 2020
ummm...no foam is good ;-)
jeffrey w on Jan 24, 2020
Control the foam while fermenting in the 6 gal Torpedo Keg
Joseph on Jul 19, 2022
Decided I might need it for newly ordered Air Still.
fieldho on Apr 22, 2022

4.7 / 5.0
29 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Love the stuff
Been using it for years. Always in my brewing toolbox.
September 12, 2022
1 month ago
Rated 5 out of 5
Works and didn't have a negative effect on the beer
August 16, 2022
2 months ago
Rated 5 out of 5
Keeps foam down to avoid boil over in my air still when using a wash of mash that may be prone to overboil.
May 15, 2022
5 months ago
Rated 5 out of 5
Definitely works!
Wow! I used this on my last 3 boils. Just a few drops made the foam disappear. No more boil overs. Impressed.
April 30, 2022
6 months ago
Rated 5 out of 5
Won't Brew Without It
Does what it says it does. Cheap. Effective. Results are often immediate. Has prevented many a boil over. Every brewer should give this a try at least once.
March 1, 2022
8 months ago
Rated 5 out of 5
A must for anything over 1.050.
February 9, 2022
over 3 years ago
Rated 3 out of 5
It works, but I can't open the bottle
The one ounce bottle is nearly impossible to open. It hurts my fingers terribly and after ten minutes I usually give up. When I've gotten it open it does work well.
November 26, 2021
1 year ago
Rated 5 out of 5
A must have brewing item
This product is amazing, so many uses to stop excessive foaming. I can more fully use the volume of pots and flasks.
April 8, 2021
1 year ago
Rated 5 out of 5
No More Boil Overs
Works great, allows for fuller kettle and no fear of boil over.
April 7, 2021
1 year ago
Rated 4 out of 5
Instant Results
I use it for foam/krausen control when I make a starter. I have 2.5L starters with a 5L flask on a stir plate and the yeast still climb out. When I first used this, the yeast was already foaming up, I put a drop of this in, looked away for a second, and when I looked again, the foam was gone completely. Instant results. I had to add another drop the next day, but it did the job by preventing the yeast from climbing out of the flask. Not sure about the chemistry and physics though...
December 31, 2020
1 year ago