Fibroxcel products are chemically inert complex filter aids, which are used in the filtration of wine and alimentary liquids. They are used in the formation of precoats and/or coats and for the continuous dosing filtration for the filtration of wine, beer and products difficult to filter such as musts, lees, sugar syrups, etc. Fibroxcel Vac is used together with perlite and diatomaceous earth in vacuum filters for the formation of precoats for the filtration of liquids difficult to be filtered.