The EurolestTM range of permanent ballast exhibits densities up to 4.5 and consists in a pre-blended combination of heavy weight washed ore aggregates pumped like a viscous slurry reaching a typical mechanical strength of 2 MPa within days. It does not shift in hard sea conditions, stays inside the tanks in case of structure damage and Its passivating properties combined with a pH in excess of 10 prevent bacteriological growth and corrosion of steel structures.