Description
WLE4000 Clarity Ferm – fining agent for gluten-reduced beer
Clarity Ferm from White Labs is a liquid enzyme that is added to the wort together with the yeast. It prevents chill haze and breaks down the gluten proteins from barley and wheat, so you can brew gluten-reduced beer. One 10 ml bottle treats 20–25 litres of wort.
How Clarity Ferm works
Clarity Ferm contains a proline-specific endoprotease, an enzyme that cuts proteins where there is a lot of the amino acid proline. Chill haze forms when polyphenols and proline-rich proteins bind together in cold beer. The enzyme breaks down these proteins before the haze forms. The gluten protein is also very proline-rich and is broken down in the same way. According to White Labs, neither head retention nor colour is affected.
How to use Clarity Ferm
Add one bottle to 20–25 litres of wort at the same time as you pitch the yeast. It works with all types of malted barley and other ingredients, including in a Fresh Wort Kit.
Technical data
- contents: 10 ml (Brewers Clarex, packed by White Labs for homebrewers)
- dosage: 1 bottle per 20–25 litres of wort
- enzyme: proline-specific endoprotease from Aspergillus niger
- storage: 4–8 °C
- shelf life: 12 months
- contains sodium benzoate
- not a GMO
Note: Even though Clarity Ferm can reduce the gluten content below the limit for gluten-free products, the beer is still brewed with barley and/or wheat malt. Homebrewed beer is not laboratory tested, so it should be described as gluten-reduced. If the beer is to be marketed or labelled as gluten-free, the producer must document the gluten content of the finished product.
Frequently asked questions about Clarity Ferm
When do I add Clarity Ferm?
At the same time as the yeast. One 10 ml bottle treats 20–25 litres of wort.
Will the beer be gluten-free?
Clarity Ferm can reduce the gluten content below the gluten-free limit, but homebrewed beer is not tested. Describe the beer as gluten-reduced, not gluten-free.
Does Clarity Ferm affect head or colour?
According to White Labs, neither head retention nor colour is affected, because the enzyme only targets the haze-forming proteins.
Can I use Clarity Ferm in a Fresh Wort Kit?
Yes. Add the bottle at the same time as the yeast supplied with the kit.
How should Clarity Ferm be stored?
Cold, at 4–8 °C. Shelf life is 12 months.
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