ULTRAGRIND PREMIUM high performance synthetic grinding fluid. ULTRAGRIND Premium is a synthetic, nitrite free, water mix grinding fluid formulated to provide a long, predictable sump life. The transparent liquid gives good view of the workpiece, is low foaming and ensures rapid settlement of grinding fines. ULTRAGRIND Premium is designed for use with all types of grinding wheels, wet abrasive belts and abrasive cut-off wheels. it is suitable for all surface, centreless and cylindrical grinding operations.