Penetrates deep into crevices, threads and seams to break the bonds that hold stuck parts together Penetrating lubricant also leaves behind a protective layer and helps prevent rust and corrosion from re-forming WD-40 Specialist Rust Release Penetrant Spray frees rusted parts 50% faster than the leading competitor according to third party testing 11 oz AerosolUPC/EAN/GTIN: 079567300007