Contains:Citric Acid Environmental:Environmentally Friendly Storage Instructions:Keep away from children. Harmful if swallowed. Suitable for:Bar Keepers Friend Cleanser & Polish is famous for removing rust, metal tarnish, mineral deposits, and stains from most hard surfaces. Excellent for removing stains and soap scum from glass shower screens. Features:BKF does not contain bleach, making it ideal for cleaning stainless steel. About the Author:What is Bar Keepers Friend? In 1882, an Indianapolis chemist noticed how clean and shiny his tarnished pot was after cooking rhubarb. Using an active ingredient that's found in the plant he formulated a talcum-smooth cleanser and sold it to the city's taverns. So pleased were his customers with how well it worked on bar fixtures, the product was dubbed the "Bar Keepers Friend "Since 1882, Bar Keepers Friend has been the “Can Do Cleanser.” Available in either powder or liquid, Bar Keepers Friend has millions of loyal users who give credence to the motto, “Once Tried, Always Used.” Usage Instructions:Being a powder, you can make either a thick paste or a watery slurry to match different surfaces and stains. A paste will be more acidic than the slurry. You’ll need more acidity when dealing with mineral deposits, or rust stains. A watery slurry is ideal for removing tarnish from a stainless steel pan, or sink.Warning:Contains Citric Acid. Do not ingest, inhale or get in eyes.