DynaMaxx is an ultra smooth, easy sanding, pinhole-free filler that provides superior adhesion to galvanized steel, aluminum, E-coat, SMC, fiberglass and cured primer and paint. It’s also stain-free and tack-free, and fully cures in only 20 minutes. It’s backed by the DynaMetal Limited Warranty System, which guarantees that it will maintain the OEM factory corrosion protection on properly rust-treated sheet metal, galvanized metal and aluminum when used in accordance with the directions.