Bar's Leaks Power Steering Fluid with Stop Leak prevents wear, inhibits corrosion, prolongs fluid life, prevents leaks and seals existing leaks in pumps, rack and pinion units, and gearboxes. The fluid contains a blend of lubricity and anti-wear agents that chemically bond to metal surfaces to prevent metal-to-metal contact, reducing wear and extending pump life. It is compatible with all petroleum-based, mineral oil and synthetic power steering fluids.