Making a traditional-style German ale? Give Kaiser a try! Kaiser is a clean German ale strain of yeast that will ferment clean, allowing the delicate nuances of the malt character to shine through! Kaiser can be used to make beers with wonderful malt flavor and aroma that mimic traditional German ales.It is a low flocculating yeast that can ferment very vigorously! Expect long clearing times that leave a beer that is clean and crisp, with very low levels of diacetyl. It works well at slightly lower temperatures, and can be used to make wonderful Altbier, Kolsch, and Berliner Weiss.