Super High Gravity Ale Yeast WLP099

White Labs Super High Gravity Ale Yeast (WLP099) hails from England and can ferment up to 25% alcohol when used correctly. It will produce ester characters that increase with increasing gravity, however the malt character dominates at lower gravities. In order to achieve >25% ABV, sugar needs to be fed over the course of the fermentation.

We recommend the following styles when using WLP009 Super High Gravity Ale Yeast: American Amber, Barleywine Ale, English Old Ale, Foreign Export Stout, Imperial IPA, and Imperial Stout.

Attenuation: 80-100%

Flocculation: Medium 

Alcohol Tolerance: Very High (Over 15%)

Optimum Fermentation Temperature:  65 - 69 F

**This strain has been genetically typed in our lab using polymerase chain reaction (PCR). Through this genetic testing, we have determined WLP099 Super High Gravity Ale Yeast to contain the STA1 gene (glucoamylase), a potential indicator of Saccharomyces cerevisiae var. diastaticus. Brewers yeast are natural hybrids, which make it possible for certain strains to display elements of the STA1 gene. These strains have the ability to utilize some dextrins (unfermentable sugars), resulting in higher levels of attenuation than what is considered typical.

At White Labs, we do everything possible to detect for undesired organisms within our process and cultures. The strains we carry with known Saccharomyces cerevisiae var. diastaticus genetics have been researched and validated to perform without excessive over-attenuating, which is possible through our nearly 25 years of experience paired with internal and external fermentation data.**