Grodal RPWB 200 Description Description – It is a synthetic water based corrosion preventive product. It is an oil free and nitrite free which is specifically designed for corrosion protection. Application – Can be used on cast iron, carbon steel, high speed steel, most ferrous, nonferrous and aluminium alloys. The Growel Advantage: Excellent Rust/corrosion protection. Since its nitric-free it eliminates possible health hazards associated with these materials. Eliminates oil mist. Provides excellent multi-metal corrosion protection. get a quote