SMART BLEND SYNTHETICS Universal Leak Eliminator, seals and stops leaks in engines, transmissions and power steering systems. This unique formula contains two synthetic seal conditioning agents, which eliminate leaks in most engines, transmissions and power steering systems. SMART BLEND SYNTHETICS ONE FORMULA Universal Leak Eliminator is compatible with mineral based and synthetic fluids and is safe for use in gasoline and diesel engines. Unlike other products Universal Leak Eliminator contains NO SOLIDS that could clog or plug filters and lines.