Alba-Rust 16 Oz.ALBA RUST effectively removes all rust and metal stains from cotton, wool, synthetics, blends and carpet. It does not tender or degrade fabrics. It may also be used to remove rust stains from porcelain, tile and other non metal hard surfaces. Must be flushed with water or steam after use. Non Flammable Works instantly Biodegradable Flushes with water or steam