Toupret Ready To Use Filler is ready mixed for use on interior surfaces, straight from the tub. It's very easy to sand down and it won't flash or grin, so there's no need to spot prime. Can be used on new or renovated substrates, either unpainted or painted: gypsum plaster, plasterboards, old painted surfaces, cement, concrete, cellular concrete, breeze blocks, bricks and stone. Can be painted over in 12-24 hours. Overcoat with any conventional paint or wallpaper.