Restore Rust Remover Gel Bora STN-RRG250 250ml. Combines the Power of Restore Non-Acidic Rust Remover in a Convenient-to-Use Gel This restore rust remover is non-acidic Easy to apply and extremely fast working Will not etch or dissolve sound metal The power of Restore Rust Remover in a gel form, perfect for non-bath applications. Non-acidic means it wont harm plastics, rubbers, or non-ferrous metals. Easy to apply, and because its a gel, can be used on large machines and vertical applications. Environmentally-friendly and fully biodegradable. Removes rust, and leaves your components and machines looking new.