RUST GUARD eliminates rust by performing two operations at one time. First, rust is converted to a black organic complex. Then a clear acrylic coating is formed. The surface can be left as is when dry or painted over using latex, oil based or epoxy paint. The coating formed by the product is sufficient to last for years without painting. Can virtually be used on all rusted surfaces. Temperature range is 0° F to 250° F for the finished film. Do not store at 32° F or below.