A white, ready mixed dispersion, the Langlow Ultra-Light Weight Filler, can be used to seal and fill gaps, cracks, depressions on interior structures. It has a low-density formulation and contains high-strength glass microspheres which gives a non-shrink surface. It is easy to apply with a spatula and can be smoothed off to provide a firm finish drying within an hour. Best suitable for surfaces on the inside, it can also be used on overhead applications and overpainted with oil or water-based paints.