Danstar's Cask and Bottle Conditioning Yeast has been specially selected for refermentation in casks or bottles, when the original fermenting strain has lost viability and will not be able to condition and carbonate the beers due to long fermentation and conditioning times. It is a very neutral, highly-flocculent strain that is perfect for repitching before bottling or priming. It can also be used as a primary fermenting yeast, as it is neutral and has a high alcohol tolerance, and is sometimes used to restart stuck fermentations. This yeast is always good to have on hand in case of a fermentation emergency!