DWF De-watering fluid for engines, ignitions and electrical contacts Castrol Motorcycle DWF is a multi-purpose aerosol penetrant and de-watering fluid for motorcycles. It provides excellent displacement of moisture from engines, ignition systems and electrical contacts. Protects against corrosion and frees corroded parts. Features Displaces moisture Penetrates clean and corroded parts Protects metal surfaces against rust Water repellent properties Helps lubricate inaccessibile mechanisms