CRC Ultra Screwloose Super Penetrant 11oz Aerosol Application Info: CRC Ultra Screwloose Super Penetrant - 11oz Aerosol Super-fast, powerful, concentrated penetrating solvent. Attacks and penetrates tough rust, gum and corrosion on contact to free corroded fasteners and mechanical components. APPLICATIONS: Rusted bolts and nuts, suspension, steering and axle parts. Automobiles, household items, plumbing fixtures, agricultural equipment, locks.