Toupret Fine Surface Filler offers an exceptionally smooth finish that helps to enhance the appearance of paint finishes. No need to sand or spot prime. Supplied ready-to-use for interior surfaces. It can be used on or renovated substrates, either unpainted or painted: gypsum plaster, plasterboard, old painted surfaces, cement, concrete, cellular concrete, breeze blocks, bricks and stone. Ready to overpaint in 8 hours