Hi Barb, these USA pans are manufactured from a mix of steel (for strength and durability), and aluminum (for superior conductivity). They are coated with Americoat, a clear, nonstick, non-toxic, environmentally friendly coating that is specially formulated for superior baking and easy release of baked goods. These pans clean up easily by just hand-rinsing in hot soapy water (dishwasher isn't necessary, nor advised). When properly cared for, these pans should not rust. 

• Reply