Depending on the metal and the severity of the rust and the required level of de-rusting it can take anywhere from 12 hours up to as long as 1 week (or more) for the chemical reaction to finish Items that are obviously damaged should be returned to base for inspection, report and rectification.

1. IDENTIFICATION OF SUBSTANCE - CRC Evapo-Rust 1. IDENTIFICATION OF SUBSTANCE - CRC Evapo-Rust

However the Evapo-rust isnt an acid its PH neutral... It uses whats called chelation to separate the iron from iron oxide...Evapo-Rust is an enviromentally safe water-based rust remover that is highly effecitve on rusted tools and auto parts. Features: Items that are not obviously damaged but do not appear to work correctly must be returned to base for inspection, report and rectification.