Description
Free seized components quickly and effectively with WD-40 Specialist Penetrant Spray 400ml, a professional-grade penetrating oil designed to break through rust, corrosion, and stubborn mechanical joints. Engineered for demanding maintenance tasks, this high-performance formula penetrates deeply into rusted threads and tight spaces where ordinary lubricants and general-purpose sprays may struggle to work. The advanced low surface tension formula allows the penetrant to travel rapidly into corroded nuts, bolts, fixings, hinges, locks, chains, bearings, and threaded connections. It helps loosen seized parts caused by rust, dirt, moisture, and oxidation, making dismantling easier and reducing the risk of damage to components during repair or maintenance work. Equipped with the WD-40 Smart Straw dual action system, the spray offers two application modes in one can. Flip the straw up for precise, pinpoint application into narrow gaps, threads, and awkward angles, or flip it down for wider coverage on larger surfaces. The integrated 360 degree valve allows spraying in any orientation, including upside down, making it especially useful for under vehicles, machinery, pipework, and hard-to-reach areas. This specialist penetrant is suitable for use on a wide range of materials including steel, stainless steel, titanium, aluminium alloys, rubber, plastic, PVC, and other metal surfaces. It performs reliably in temperatures from -20 degree celsius to +90 degree celsius, making it suitable for both indoor and outdoor maintenance tasks throughout the year. In addition to freeing seized parts, the formula leaves behind a water-resistant protective barrier that helps guard against future rust and corrosion. This added protection is valuable for exposed fixings, pipes, tools, conveyor systems, bearings, and other components operating in damp or challenging environments. By helping prevent further corrosion build-up, it can contribute to longer service intervals and reduced maintenance frequency. WD-40 Specialist Penetrant is developed for mechanics, engineers, technicians, maintenance professionals, and serious DIY users who require dependable performance in workshops, garages, industrial settings, and field applications. Whether you are restoring equipment, servicing automotive parts, maintaining machinery, or loosening rusted household hardware, this penetrant provides fast and consistent results. For a complete maintenance routine, surfaces can first be cleaned with WD-40 Specialist Degreaser, followed by the application of the Penetrant to release seized components. After disassembly, parts can be protected and lubricated with WD-40 Specialist White Lithium Grease or other appropriate specialist products for long-term performance. The 400ml aerosol can provides generous coverage while remaining easy to handle and store in toolboxes, garages, workshops, and maintenance vehicles. The controlled spray pattern helps minimise waste and improves application accuracy compared with conventional penetrating oils. Trusted worldwide for professional maintenance solutions, WD-40 Specialist Penetrant Spray 400ml combines rapid rust penetration, strong release action, corrosion protection, and versatile Smart Straw application in one convenient product. It is an essential addition to any workshop or tool kit for freeing rusted, corroded, and seized metal components quickly, safely, and efficiently.