Fermentis SafAle S-04 is a well-known, bottom-fermenting ale yeast strain. S-04 is a big, clean flavor with a rapid fermentation time and a highly flocculant character. It contains a yeast of fast fermentation characteristics and an ability to form a compact sediment at the end of the fermentation process. SafAle S-04 works for a wide range of ales but is especially well adapted to closed fermentation vessels.
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