Polyfilla Professional Gloss Finish filler is formulated with fine 'glass' bubbles for easy sanding and perfect gloss retention. Ideal for a perfect finish with gloss and flat paint on timber, plaster, concrete, mortar and primed metals. Features Perfect gloss retention Super smooth finish Easy to sand Suitable for timber, concrete, mortar, plaster and primed metal. Applications Interior use Application Tips Surface to be filled should be clean and dry with no loose or powdery material. Press filler firmly into cracks and holes and remove excess. Allow to dry (2-3 hours in thin 2-3mm applications depending on humidity). Allow longer drying times if painting with oil based paints (24 hours minimum) or for deeper applications. Sand with fine sandpaper. For a perfect finish after initial sanding back, apply another very thin coat of filler, allow to dry and sand lightly with very fine (400grit) sandpaper before painting. Protect from rain until painted over. Do not use below 5 degrees. Not for exterior timber likely to absorb excessive amounts of water. Use Poly Gap filler or silicone sealant where joint movement occurs. Clean up with water before filler dries. Cure product before disposal.