Spread the Love. Tate and Lyle's Jam Sugar is vital in jams as a natural preserving agent and flavouring. Added pectin helps ensure a perfect set when using low pectin fruits like strawberries or cherries. Did you know it is thought that some of the first jams were produced in the Middle East? Ideal for use with jams and sponges. Each pack is 1kg. There are 10 packs in each 2.4kg wholesale bulk pack.