Power Steering Stop Leak 12 oz

Lucas Oil Power Steering Stop Leak 12 oz is a specialized fluid additive designed to seal and prevent leaks in power steering systems across vehicles of all ages. Whether you're managing aging hoses, worn seals, or gradual weeping from deteriorated pump gaskets, this stop-leak formula addresses the root cause of most steering fluid loss without requiring full system replacement. Mechanics and DIY enthusiasts trust this product to restore system integrity, maintain consistent steering feel, and avoid costly hydraulic component failures.

The formulation works by conditioning rubber seals and gaskets throughout the power steering circuit, reducing shrinkage and brittleness that develop over time and mileage. When added to existing power steering fluid, the 12 oz concentrate softens hardened seal material and restores its elasticity, allowing seals to expand slightly and create a tighter fit against pump shafts, hose connectors, and valve body ports. This approach is far less invasive than seal replacement and maintains full compatibility with both conventional and synthetic power steering fluids, making it an effective preventive maintenance tool for vehicles with minor to moderate leakage.

This product is ideal for truck owners, vintage car restorers, and fleet operators facing recurring steering fluid loss in older or high-mileage vehicles. Application is straightforward: simply pour the entire 12 oz bottle into the power steering reservoir through the filler cap, then run the engine and turn the wheel lock-to-lock several times to circulate the additive throughout the system. Results typically appear within the first 50–100 miles of driving, though severe leaks may require supplemental applications or eventual component replacement if seals have become permanently damaged.