Rust-Block is a new product that will coat the metal with a non-sticky coating that inhibits rust from forming for up to 6 months. Just like Evapo-Rust, Rust-Block is safe on all metals, biodegradable, and has no harmful fumes. Just spray on and when you?re ready to paint or finish your part, just rinse it off with warm soapy water, or follow your normal paint prep procedures. Store your protected parts indoors. This is a water-based product that will be rinsed off by rain/outdoor weather. Comes in a 16oz spray bottle. Made in the USA.