Polycell Fine Surface Polyfilla is an easy way to fill fine cracks of up to 2mm. It produces a professional, glass smooth surface, and is ideal for minor blemishes and wood grain. The Polyfilla is quick drying, and touch dry in 30-60 minutes (depending on conditions). Once dry, it can be painted over to produce a flawless finish. Suitable for indoor use on wood and plaster.