The Lincoln Electric RP6 Weldable Rust Preventative Fluid provides up to six months of indoor corrosion protection by preventing rust on ferrous metals, while not adversely impacting the welding process. RP6 is an oil-based solution for welding applications where raw materials may be subject to corrosion prior to welding. Metals treated with RP6 require minimal cleaning prior to welding. After applying RP6, there is no need to grind, shot blast or chemically clean the joint prior to welding. RP6 can be dipped, sprayed or brushed onto ferrous metals, and it is offered in 55-gal drums and 5-gal pails.