Add the tamarind pulp to a bowl. You can use tamarind pulp or remove the pulp from the whole fruit by yourself, although the latter option is quite time-consuming.
Bring the water to a boil and pour it over the tamarind pulp. Let it rest for 10-15 minutes. At this point, you can use a spoon to slightly mash the tamarind pulp.
Strain through a fine sieve mesh and discard the pulp. Note: you can also keep the pulp to use it to make other dishes like chutney, for example.
The tamarind juice is now ready to use! Tamarind juice will keep for up to 7 days in the refrigerator.