Tetrion Powerfil is an extra strong 2 Part Filler and is ideal as a multi surface filler. Powerfil is ideal for filling stone, wood, metal and most plastics, sets 5 times harder than concrete in just 15 minutes. Powerfil allows large holes to be filled horizontal or vertical, without slumping. Its smooth finish can be sanded, over-painted and drilled within 15 minutes. The versatile formulation is also perfect for filling smaller holes, cracks and grain or knot holes in new wood. It can be used on most hard surfaces, is resistant to vibration, will not shrink or crack and cures fully to any depth in one application.