The Toupret Touprelith F Exterior Filler 15kg is ideal for use on new or renovated substrates, either unpainted or painted: Gypsum plaster, plaster tiles, plasterboards Old painted surfaces Cement, concrete, cellular concrete, breeze blocks, bricks, stones. Setting in 30 minutes and can be applied in thin coats, this is easy to shape to fill and repair without formwork!