ILFORD Multigrade fixer is suitable for using with film or paper. For film, it is recommended to dilute 1+4, and fix for 2-4 minutes (3-5 minutes for Delta or T-Max films). In other words, use it just like Universal Rapid Fixer.(posted 8283 days ago)Multigrade fixer is not compatible with a hardener, but as others have stated, you don't need one anyway.
David Carper ILFORD Technical Service