Check out their website it is used on everything from bridges to dams to oil rigs in salt water environment. I just wish I had found this stuff years ago. I was tired of paying through the nose every 5-10 years to paint our historic metal roof and we had a water leak that two different roofers could not detect/fix. We painted with Rust-Grip, Now no leak! We top coated with Sherwin Williams enamel on the house and left as is silver on two other metal roofs.Rust Grip® is a tough, one-part, moisture-cure polyurethane coating that absorbs atmospheric moisture to her cure. Rust Grip® is loaded with a metallic pigment for strength and is also resistant to chemical solvents and acid splash. Upon curing, Rust Grip® provides a protective coating film of superior adhesion and flexibility, and is resistant to abrasion and impact. Rust Grip® can be used as a primer or as a one-coating system. It is patented to encapsulate lead-based paints and other toxic materials, including asbestos. Rust Grip® can be applied over pressure-washed, completely dry flash rust and firmly bonded commercial paints. In most cases, a white or near-white blasting is not required. A light to medium surface rust is preferred as the profile. The item "5 Gallon Rust-Grip Paint Silver/Gray Perfect for metal roofs any other metal" is in sale since Tuesday, December 29, 2020. This item is in the category "Business & Industrial\Building Materials & Supplies\Industrial Paint, Coatings & Supplies\Industrial Paints". The seller is "abbysmymare" and is located in Bluemont, Virginia. This item can't be shipped, the buyer must pick up the item.