Is this the same stuff as it came up in the Google results? (showing as in stock)
White Labs Ultra-Ferm 10ml (thehomebrewery.co.uk)
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Enzyme for Brut IPA and low carb beer. Enzyme that helps increase the attenuation by converting starch and dextrines to fermentable glucose. Suitable for beer styles with high levels of attenuation, like Brut IPA.
Ultra-Ferm is liquid Amyloglucosidase (AMG) from Aspergillus niger. Converts starch and long-chained carbohydrates to glucose by hydrolysis. The enzyme can give total hydrolysis of dextrines to fermentable glucose, as compared to 75 - 80 % with normal mashing procedures.
Can be used with unmalted grains as source for starch. Also suitable for fruit beers, cider and distilling.
Add at beginning of mash-in.
Dosage: 10 ml per 20 liters
Recommended temperature: 60 °C (denaturation occurs at 85 °C)
Optimal pH 3,5 - 5,5
Store at 4 - 8 °C