Bentonite is a fining product can be added during fermentation or after fermentation. Holds a negative charge, so may be used in conjunction with a positive charge fining agent eg islinglass or sparkolloid.
Use 10g per 5 litre / 1 gallon of homemade wine as finings for home winemaking.
Will not clear all hazes eg pectin hazes.
Highly absorbing, so protect from humidity & odours.
Before use, test odour in an aqueous (water) solution.
Rack your wine first. Add & vigorously stir in a 15 times larger amount of cooled boiled water (ie for 10g use 150ml water). Leave to swell for 6 hours, stirring from time to time. Then add to must and shake or mix through. Once wine has cleared (may take anywhere from a few hours to 2 weeks), rack wine leaving behind the sediment.
The pictures show (from top to bottom):
1/ Before and after using bentonite (carrot wine). The carboy on the left has been treated with bentonite whilst the bottle on the right from the same batch of wine, has not.
2/ Grapefruit wine before using bentonite.
3/ The same grapefruit wine after using bentonite.