WLN4000 Clarity Ferm


1) To reduce the appearance of chill haze, while also increasing the shelf life of packaged beer. 
2) Produces gluten-reduced beers that are brewed using barley and wheat.

Available in a variety of packages, from homebrew to professional brewer. 

*Note: Clarity Ferm is made with Brewers Clarex by DSM. White Labs is certified by DSM to produce and distribute a diluted version of Brewers Clarex, which is ideal for homebrewers and smaller professional brewers producing less than 5,000 barrels per year. 


Chill haze in beer results from the precipitation of complexed polyphenols and proteins during cold storage. This haze develops over time and, initially, is reversible (haze disappears when the temperature of the beer increases). Eventually this chill haze can become permanent.

Clarity Ferm will prevent the precipitation of complexed polyphenols and proteins by hydrolyzing the sensitive (haze-active) polypeptides in the region where such hydrogen bonding occurs. The specificity of the enzyme ensures that no other beer parameters (i.e. flavor, aroma) are affected.

This easy-to-use enzyme can be used on all types of brewing materials and is a cost effective product to replace silica gel or PVPP. Simply add when pitching yeast, and Clarity Ferm will do its work during fermentation. Once fermentation is complete, the possibility of chill haze occurring will be eliminated.

In addition to eliminating chill haze, Clarity Ferm significantly reduces the gluten content in beers made with barley and wheat. A Clarity Ferm treated beer made from barley or wheat usually tests below 20 ppm of gluten, the current international standard for "gluten free." White Labs also offers gluten testing for beers. While this test allows brewers to know the gluten level of their beers, the values may not be used on their labels until the FDA completes its own validation.


Read how one prominant brewery is using Clarity Ferm to reduce gluten on our blog.
Brewers Clarex is ideal for mid- to large-sized brewers. Cick here for more information. 


Clarity Ferm Size Chart and Dosage Rates (mls/BBL)


Total BBLs/Package

Gluten Reduction

Chill Haze Reduction

Clarity Ferm - 20L


10.0 - 12.0

10.0 - 15.0

Clarity Ferm - 10L


10.0 - 12.0

10.0 - 15.0

Clarity Ferm - 1L


10.0 - 12.0

10.0 - 15.0

Clarity Ferm - 10ml


5 gallons

10 mls/ 5 gallons

10 mls/ 5 gallons



Dosage Rate Calculator

Select the type of Enzyme
?Please select if you are using Brewers Clarex or Clarity Ferm. Brewers Clarex is the undiluted form of the enzyme.
Select the Kind of Beer
?Select the type of beer that most closely resembles your objective.
Select the Amount of Beer
?Select the amount of beer that you are brewing.
Convert specific gravity to Plato

Quantity to dose

?Total mls of Brewers Clarex or Clarity Ferm (depending one what was chosen in the first box) to dose at beginning of fermentation.