Mutilated1
Beer Drenched Executioner
Count me as a skeptic of the 10% thing as well. I do not see how IBUs could possibly change in the fermenter. You need heat to utilize the alpha acids (as far as I know), and the conditions in the fermenter are not such. The only possible thing I can think of is that in the boil this slightly reduces the amount of hop build up on the sides of the kettle. However, we have already discussed and been convinced that this does not affect IBUs or hop profile in any substantial way.
Fermcap is a great product and I have not anecdotaly seen a change in IBUs from using it.
It sort of makes sense that it might make hop utlilization better if you added it during the boil though. If the wort doesn't foam up then the hops don't get stuck to the side of the pot so more hops stays in the wort - maybe thats how it works ? Of course thats pure speculatoin on my part - I've never used the stuff.
I don't really see how it could help in the fermenter though. At least help as far as make the hop utilization better.