Alcotec 48hr is a high alcohol & temperature tolerant dual function yeast complete with needed nutrients. Yields up to 14% alcohol in just 48 hours, or 20% in 5 days. Still best to ferment out for 5-7 days. Note: to reach a 21% alcohol wash, you MUST ferment between 18-24 degrees. Yeast used with 6 kg of sugar ferments between 20-35 degrees. Yeast used with 8 kg of sugar ferments between 20-27 degrees.