WD-40 Specialist Fast Release Penetrant is designed to quickly penetrate rusted and corroded parts, loosening seized fixings. Its advanced formulation provides lubrication and prevents rust and corrosion, while being highly water resistant. It has a very low surface tension, allowing it to penetrate rust effectively. The product is safe to use on metals, alloys, rubber, plastics, and most paints. It also functions as an effective mould release agent. The Smart Straw technology allows for precise or wide dispersion, and the 360° valve enables upright or upside-down application, making even hard-to-reach jobs possible. It withstands temperatures from -20°C to +90°C. Suitable for various uses including bolts, screws, car and bike nuts, window hinges, jammed car bulbs, rusty locks, and seized taps. This 400ml spray can is a powerful, fast-acting solution for demanding jobs.