Tetrion 2K Powerfil Filler is a rapid-cure, super strong filler which sets 5 times harder than concrete in 15 minutes. Tetrion 2K Powerfil's technology enables the user to fill large holes, horizontal or vertical, without 'slumping'. Its smooth finish can be sanded, over painted (with all paint types) and drilled within 15 minutes. The versatile formulation is also perfect for filling small holes, hairline cracks and grain or knot holes in new wood. Tetrion 2K Powerfil 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. Suitable for interior and exterior use.