Shisha molasses typically contain between 15% and 25% tobacco. The remainder is comprised of molasses, glycerine and flavour.
It is heated, not burned. An external heating element – charcoal – is placed over a bowl which contain the molasses. Typically, the shisha molasses are heated to around 190C, releasing an aerosol that is 60% water, 15% glycerol and 25% dry particulate matter which includes flavor and nicotine.