This yeast has good tolerance to ethanol and free sulfur dioxide, and ferments to dryness. Premier CuvÃ©e is noted as a very low producer of foam, urea, and fusel oils. It is recommended for reds, whites and especially champagne. This yeast is reported to perform well restarting stuck fermentations. Winemakers have remarked that Premier CuvÃ©e is the fastest, cleanest and most neutral fermenter offered by Red Star. Ferments best between 45Âº and 95Âº F (7Âº - 35Âº C).