Krud Kutter RX01 Rust Converter, 1-Gallon N/A Made in USA This item is a Rust Converter, 1 gal. Purpose of use for Painting Supplies, house-primers This product is manufactured in United States Rust is chemically changed to iron phosphate, that turns the metal black. This increases the paint adhesion and durability of the coating Can be used to etch new galvanized metal Easy-to-use, can be applied by brush, roller, mpp or low pressure sprayer Treats 600-square feet per gallon Environmentally friendly: Biodegradable, water-based formula is compatible with any paint system