We producing Heavy liquid LST(м) on the basis of Lithium Heteropolyoxotungstates(density of 2.85-3.05 g / ml). LST(м) is a heavy low-viscosity(about ~10 cP) concentrated aqueous solution of Lithium heteropolyoxotungstate light-yellow color maximum density of 3.05 g / ml at the normal conditions. Lithium SilicoTungstate structurally modified by safe chemical (about 0.3 mass%). Thus, it was possible to reduce the crystallization temperature of the solution to -15 degrees Celsius and increase its maximum density to 3.05 g/ml (pH=5-6). Shipping to the South Africa by Post at our expense (EMS-express, DHL).