ADIHEM weighting material is ground Hematite and meets API Specification 13A Section 8 for drilling fluid Hematite. It is used to increase the density of drilling fluids to control formation pressures. ADIHEM weighting material has a specific gravity of 5.1 and can be used to increase the density in oil-and water-based drilling fluids up to 25 lb/gal (3.0 SG). ADIHEM weighting material has a higher specific gravity than barite, and so requires less total product to achieve the same fluid density, but tends to be more abrasive than barite weighting material.