The present invention refers to a tablet (1) for retaining a volatile substance in a liquid or solid state, such as a perfume and/or an insecticide. The tablet comprises at least a first and a second layers (2,4) of volatile substance retaining material, said first and second layers being spaced apart from each other at a selected distance, and wherein it further comprises a layer of impermeable material (3) joined to said layers and located in between said first and second layers.