Lucas Power Steering Stop Leak (12 Oz.)

A small power steering leak can turn into a noisy, stiff-steering headache quickly, and topping off the reservoir only buys so much time. Lucas Power Steering Stop Leak in a 12 oz bottle is a blend of special oils and petroleum-extracted additives formulated to recondition worn seals and stop common leaks in power steering systems.

Lucas designed this formula without solvents, which matters because solvent-based products can accelerate seal degradation over time. Instead, the additive package works to swell and soften hardened rubber seals back toward their original dimensions, closing gaps where fluid escapes. Beyond sealing, it also addresses the symptoms that come with a worn rack and pinion — the slack, squeals, and hard spots that make steering feel loose or unresponsive. The formula is compatible with all power steering fluids, so you can add it to any system regardless of what is already in the reservoir.

Pour it in, drive normally, and give it a few days to work through the system. Many owners report noticing a reduction in leaking and improved steering feel within the first week. For a system with a slow drip and some age-related wear, this is a practical first step before committing to a full rack replacement.