201W "FREE-ALL" PENETRATING OIL penetrates rust, scale and corrosion to free parts and assemblies INSTANTLY. Loosens red and white lead, tar, grease, carbon and graphite deposits. Contains no silicones. Ideal for all automotive and marine applications. Will free-up rusted machine screws, bolts, nuts, pliers and cutters, snips and shears, clamps for mufflers and tail pipes, universal joints and other machine linkage, all threaded pipe connections, pillow blocks, locks and padlocks.