The #1-selling penetrant since 1957, PB B'laster, is back with the new and improved B'laster ProStraw. The same legacy formula that quickly loosens rusted or frozen parts now offers Control Flow Technology. Easily switch between Spray, Drip, or Stream, giving the capability to adjust the volume of penetrating oil dispensed. PB B'laster penetrant also contains a non-evaporating lubricant that protects against further rust and corrosion. It is also a great rust inhibitor and penetrating oil for seized bolts, rusted nuts, corroded pipe threads, and other industrial, plumbing, and agricultural equipment applications. Simply saturate the troubled area, and if you need more, do it again.