SafAle S-04 is a dry English ale yeast from Fermentis, selected for its high flocculation and reliable performance in bottle-conditioned and cask ales. It drops clear quickly, leaving a firm, compact sediment that is easy to manage whether you are bottling or racking to keg.

Best suited to: English bitter, ESB, English Pale Ale, porter, stout, brown ale, mild, and cask-conditioned ales. Also works well in American-style ales where a slightly firmer body is wanted.

Fermentation parameters:

• Temperature: 15–22°C — best results at 18–20°C
• Attenuation: 73–77%
• Flocculation: High
• Alcohol tolerance: up to 9% ABV
• Pitching rate: 50–80g per 100L

Flavour contribution: Neutral to lightly fruity, with a clean finish that lets malt character come through. The high flocculation means very little yeast haze in the finished beer, even without cold crashing.

Choose S-04 over US-05 when you want more body and a firmer sediment. US-05 attenuates more aggressively and stays in suspension longer. S-04 suits classic English styles where residual malt sweetness is part of the profile.

Pitching note: Rehydrate in 10x its weight in water at 27°C for 15 minutes, or sprinkle directly onto wort. Direct pitching works fine for standard gravity beers under 1.065.

Storage: Keep refrigerated. Once opened, reseal and use within 7 days. Do not use if sachet is soft or swollen.