Gunk B532 Rust Raider - 1 Quart GUNK is a local family owned company based out of Charlotte, NC. For more than 75 years, GUNK products, developed by the people who use them, has earned the trust of hard-working tradesment and the active DIYer through consistent, superior performance and a commitment to innovation. Guaranteed completely harmless to metals Simple method insures continuing protection Contains no poison