Fermentis SafAle™ K-97 · Dry German Ale Yeast · 11.5 g

Floral, gently fruity and never shouty. K-97 is a German ale yeast built for delicate beers like Kölsch — and it throws up a big, firm head while it works.

Attenuation 80–84 % · 18–26 °C · Slow sedimentation · Medium esters · 50–80 g/hl · 11.5 g sachet

What it does in your beer

K-97 has a subtle fermentation character: depending on conditions, it leans floral with a balanced fruitiness. Apparent attenuation is 80–84 %, with medium esters and medium higher alcohols.

Fermentis recommends it for German Kölsch, Belgian witbiers and some session beers. It also suits heavily hopped beers and forms a large, firm head during fermentation.

At a glance

How much for a 20 L batch

Fermentis recommends 50–80 g/hl. For 20 L (0.2 hl) that's 10–16 g, i.e. 1–2 sachets of 11.5 g (approx.).

A single 11.5 g sachet lands inside that range; the top of the range takes a second one.

How to use

• Direct pitch: with the wort at or above fermentation temperature, sprinkle the yeast over the surface a little at a time so it doesn't clump.
• Or rehydrate in at least 10× its weight of sterile water or boiled, hopped wort at 25–29 °C (115 ml or more per sachet), rest 15–30 minutes, stir gently and pitch.
• Ferment at 18–26 °C.
• Leave headspace in the fermenter: K-97 builds a large, firm head.

Pairs well with

Brewing a Kölsch? Try it with our floor-malted Czech Pilsner malt, a small share of BESTMALZ BEST Wheat and Saaz for a soft, noble bitterness.

Storage & shelf life

• Keep it cool and dry. Fermentis allows storage below 24 °C for up to 6 months and recommends below 15 °C beyond that — the fridge covers both.
• Shelf life: 36 months from the production date.
• Opened sachet: seal it, store at 4 °C and use within 7 days.

Food information

• Food business operator: Fermentis division of S.I. Lesaffre, 137 Rue Gabriel Péri, BP 3029, 59703 Marcq-en-Barœul Cedex, France
• Name: Active dry brewing yeast, SafAle™ K-97
• Ingredients: yeast (Saccharomyces cerevisiae), emulsifier: sorbitan monostearate (E491)
• Allergens: none of the listed ingredients is an EU 1169/2011 allergen. Fermentis produces its yeast using glucose syrup derived from wheat, which is permanently exempt from allergen labelling in the EU; gluten in the finished product is below 20 mg/kg
• Net quantity: 11.5 g
• Storage: cool and dry; below 15 °C for storage beyond 6 months

Údaje o potravině (CZ)

• Název: Aktivní sušené pivovarské kvasnice, SafAle™ K-97
• Složení: kvasnice (Saccharomyces cerevisiae), emulgátor: sorbitan-monostearát (E491)
• Alergeny: žádná z uvedených složek nepatří mezi alergeny podle nařízení (EU) č. 1169/2011. Fermentis vyrábí kvasnice s použitím glukózového sirupu z pšenice, který je v EU trvale vyňat z označování alergenů; obsah lepku v hotovém výrobku je pod 20 mg/kg
• Čisté množství: 11,5 g
• Skladování: v chladu a suchu; při skladování déle než 6 měsíců pod 15 °C
• Provozovatel potravinářského podniku: Fermentis division of S.I. Lesaffre, 137 Rue Gabriel Péri, BP 3029, 59703 Marcq-en-Barœul Cedex, France

Good to know

• 11.5 g sachet — one sits inside the Fermentis dose for a 20 L batch.
• Check the best-before on the sachet; shelf life is 36 months from production.
• It ships from our partner warehouse in the Czech Republic, not with our equipment, so it may turn up on a different day.

FAQ

What beers is K-97 for?
Fermentis recommends it for German Kölsch, Belgian witbiers and some session beers, and says it suits heavily hopped beers too.

Do I need to rehydrate K-97?
No. Fermentis allows direct pitching onto the wort; rehydration at 25–29 °C for 15–30 minutes is optional.

How many K-97 sachets for 20 L?
One or two. 50–80 g/hl is 10–16 g for 20 L, and one 11.5 g sachet falls within that.

Is K-97 gluten-free?
Fermentis says its yeast is produced using glucose syrup derived from wheat, but gluten in the finished product is below 20 mg/kg, so it can be considered gluten-free. In the EU, that wheat-based glucose syrup is exempt from allergen labelling.