The pod of the tamarind tree contains seeds that are covered by a fleshy pulp. It adds a unique fruity sourness to many dishes and is available in Asian and Indian specialty shops. Tamarind concentrate is a thick dark paste sold in small plastic tubs. Tamarind paste, sometimes called the pulp, is sold as a pliable block wrapped in plastic. Both will keep at room temperature for more than a year. This Cock brand’s tamarind concentrate is a concentrated form of tamarind juice (and very convenient to use because it removes the need for mixing & straining). With tamarind concentrate, you can prepare most recipe that calls for tamarind, but there are some recipes that call for pure Ingredients: Tamarind, water, sodium benzoate.