SikaBiresin AP004 (Formerly APF 4), is a high quality, quick setting filler designed for industrial applications. It has excellent mixing and handling properties and provides exceptional adhesion with a minimal amount of shrinkage. It bonds to a wide variety of materials including wood, aluminum, steel, cast iron, cast steel, tool steel, copper, bronze, fiberglass (FRP and SMC), honeycomb paneling and urethane foam.