Grodal RPWB 500 Description It is synthetic water based corrosion preventive as well as excellent cleaning chemical. Application : It is an oil free lubricant specifically designed for corrosion protection on cast iron, carbon steel, high speed steel, most ferrous & nonferrous alloys. The Growel Advantage : Excellent Rust/corrosion protection. Eliminates oil mist. Excellent multi-metal washing/cleaning /degreasing properties. get a quote