Like all dried fruits, raisins can be kept for several months when stored properly. This is because of their reduced water content, which extends the shelf life of dried fruit. Wholesale buying and storing raisins in large quantities is therefore no problem at all. However, it’s important to ensure the packaging is air-tight, lightproof and protected from heat sources. Sealed jars and containers are best suited for storing raisins and sultanas. Moisture penetration must be avoided, otherwise mould may form on the raisins.